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Frequently asked questions

The following is a list of possible situations that may arise during the use of 
your computer. Easy solutions are provided for each one.

I pressed the power switch and opened the display, but the 
computer does not start or boot-up.

Look at the power indicator:

If it is not lit, no power is being supplied to the computer. Check the 
following:

-

If you are using on the battery, it may be low and unable to power 
the computer. Connect the AC adaptor to recharge the battery pack.

-

Make sure that the AC adaptor is properly plugged into the computer 
and to the power outlet.

If it is lit, check the following:

-

Is a non-bootable (non-system) disk in the external USB floppy drive? 
Remove or replace it with a system disk and press <Ctrl> + <Alt> + 
<Del> to restart the system.

Nothing appears on the screen.

The computer's power management system automatically blanks the screen to 
save power. Press any key to turn the display back on.

If pressing a key does not turn the display back on, three things might be 
the cause:

The brightness level might be too low. Press <Fn> + <

> (increase) to 

adjust the brightness level.

The display device might be set to an external monitor. Press the display 
toggle hotkey <Fn> + <F5> to toggle the display back to the computer.

If the Sleep indicator is lit, the computer is in Sleep mode. Press and release 
the power switch to resume.

Image is not full-screen.

Each computer display has a different native resolution depending on the 
screen. If you set the resolution lower than this native resoution, the screen 
expands to fill the computer display. Right-click on your Windows desktop and 
select Properties to bring up the "Display Properties" dialog box. Then click on 
the Settings tab to make sure that the resolution is set to the appropriate 
resolution. Resolutions lower than the specified resolution are not full-screen 
on the computer or on an external monitor.

Summary of Contents for TravelMate C310 Series

Page 1: ...TravelMate C310 Series User s Guide ...

Page 2: ... concerning your unit should include the serial number model number and purchase information No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronically mechanically by photocopy recording or otherwise without the prior written permission of Acer Incorporated Model number __________________________________ Serial number _____...

Page 3: ...ou to the basic features and functions of your new computer For more on how your computer can help you to be more productive please refer to the AcerSystem User s Guide This guide contains detailed information on such subjects as system utilities data recovery expansion options and troubleshooting In addition it contains warranty information and the general regulations and safety notices for your ...

Page 4: ...t expose the computer to direct sunlight Do not place it near sources of heat such as a radiator Do not expose the computer to temperatures below 0 ºC 32 ºF or above 50 ºC 122 ºF Do not subject the computer to magnetic fields Do not expose the computer to rain or moisture Do not spill water or any liquid on the computer Do not subject the computer to heavy shock or vibration Do not expose the comp...

Page 5: ...refer to Frequently asked questions on page 21 Caution Changes or modifications not expressly approved by the manufacturer could void the user s authority which is granted by the Federal Communications Commission to operate this computer Operation conditions This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful i...

Page 6: ... Right view 3 Rear view 4 Base view 5 Specifications 6 Indicators 9 Launch keys 10 Touchpad 11 Touchpad basics 11 Using the keyboard 13 Lock keys and embedded numeric keypad 13 Windows keys 14 Hotkeys 14 Special keys 16 Ejecting the optical CD or DVD drive tray 17 Using a computer security lock 17 Audio 18 Adjusting the volume 18 Using the system utilities 19 Acer eManager 19 Launch Manager 20 Fre...

Page 7: ...s 33 Setting up a home office 33 Traveling with the computer 33 Preparing the computer 33 What to take with you 34 Special considerations 34 Traveling internationally with the computer 34 Preparing the computer 34 What to bring with you 34 Special considerations 35 Securing your computer 35 Using a computer security lock 35 Using passwords 35 Entering passwords 36 Setting passwords 36 Expanding th...

Page 8: ...eRecovery 44 Create backup 44 Restore from backup 45 Create factory default image CD 45 Re install bundled software without CD 45 Change password 46 Troubleshooting 47 Troubleshooting tips 47 Error messages 47 Regulations and safety notices 50 ENERGY STAR guidelines compliance 50 FCC notice 50 Modem notices 52 Important safety instructions 55 ...

Page 9: ...elMate computer Front view Item Description 1 EMR stylus Electromagnetic Resonance EMR stylus is used to input data in tablet mode Use only an EMR compatible stylus to input data on the screen 2 Display screen Also called Liquid Crystal Display LCD displays computer output 3 Tablet Keys Add enhanced functionality when operating in Tablet mode ...

Page 10: ...e buttons the center button serves as a 4 way scroll button 7 Touchpad Touch sensitive pointing device which functions like a computer mouse 8 Keyboard For entering data into your computer 9 Status indicators Light Emitting Diodes LEDs that turn on and off to show the status of the computer s functions and components Item Description 1 Speakers Left and right speakers deliver stereo audio output 2...

Page 11: ...er MediaBay modules DVD Dual drive DVD CD RW combo drive secondary hard disk drive or weight saver 5 Optical drive eject button Ejects the optical drive tray from the drive 6 LED indicator Lights up when the optical drive is active 7 Emergency eject hole Ejects the optical drive tray when the computer is turned off 8 Pen slot Keeps the stylus handy when not in use Icon Item Description 1 4 in 1 ca...

Page 12: ...nputs from external microphone or audio devices e g portable cd players walkmans 2 Speaker out line out Headphone jack Connects to audio devices e g speakers headphones 3 IEEE 1394 port Connects to IEEE 1394 devices 4 124 pin Acer ezDock connector Connects to Acer ezDock 5 Ethernet RJ 45 port Connects to an Ethernet 10 100 1000 based network depends on model 6 Modem RJ 11 port Connects to a phone ...

Page 13: ...atch Unlatches the Acer MediaBay module for removal of module 2 Acer MediaBay Houses an Acer MediaBay module 3 Cooling fan Helps keep the computer cool Note Do not cover or obstruct the opening of the fan 4 Memory compartment Houses the computer s main memory 5 Hard disk protector Protects the hard disk from accidental bumps and vibration 6 Hard disk bay Houses the computer s hard disk secured by ...

Page 14: ...adeable to 2 GB using two soDIMM modules dual channel support Display and graphics 14 1 XGA TFT LCD supporting EMR pen based input 1024 x 768 resolution LCD rotates to convert from notebook to Tablet mode Intel 915GM integrated 3D graphics featuring Intel Graphics Media Accelerator 900 and up to 128 MB of VRAM supporting Microsoft DirectX 9 0 or NVIDIA GeForce Go 6200 with 32 MB of VRAM supporting...

Page 15: ...r Audio Realtek ALC655 Codec audio system with built in speakers and microphone Sound Blaster Pro and MS Sound compatible Communication Modem 56K ITU V 92 with PTT approval Wake on Ring ready LAN gigabit Ethernet Wake on LAN ready WLAN Intel PRO Wireless 2200BG network connection dual band 802 11b g Wi Fi CERTIFIED solution supporting Acer SignalUp wireless technology WPAN integrated Bluetooth I O...

Page 16: ... Options and accessories Acer ezDock Acer MediaBay DVD Super Multi double layer drive module Acer MediaBay 60 80 100 GB 2nd hard disk drive module Acer MediaBay 40 W 6 cell 3600 mAH Li ion 2nd battery pack 256 512 MB or 1 GB DDR2 400 533 MHz soDIMM modules External USB floppy disk drive Environment Temperature Operating 5 C to 35 C Non operating 20 C to 65 C Humidity non condensing Operating 20 to...

Page 17: ...2 Fully charged The light shows green when in AC mode Icon Function Description Wireless LAN Indicates the status of wireless LAN communication Bluetooth Indicates the status of Bluetooth communication Power Lights up when the computer is on Sleep Indicates PC is in Sleep or Hibernation mode Media activity Indicates when the hard disk or optical drive is active Battery Lights up when the battery i...

Page 18: ...19 The mail and Web buttons are pre set to email and Internet programs but can be reset by users To set the Web browser mail and programmable keys run the Acer Launch Manager See Launch Manager on page 20 Launch key Default application Bluetooth Activate Bluetooth communication Wireless LAN Activate wireless LAN communication Acer eManager user programmable P User programmable Mail Email applicati...

Page 19: ...ow you how to use the touchpad Move your finger across the touchpad 2 to move the cursor Press the left 1 and right 4 buttons located beneath the touchpad to perform selection and execution functions These two buttons are similar to the left and right buttons on a mouse Tapping on the touchpad is the same as clicking the left button Use the 4 way scroll 3 button to scroll up or down and move left ...

Page 20: ...Function Left button 1 Right button 4 Main touchpad 2 Center button 3 Execute Quickly click twice Tap twice at the same speed as double clicking a mouse button Select Click once Tap once Drag Click and hold then use finger on the touchpad to drag the cursor Tap twice at the same speed as double clicking a mouse button rest your finger on the touchpad on the second tap and drag the cursor Access co...

Page 21: ...case Num Lock Fn F11 When Num Lock is on the embedded keypad is in numeric mode The keys function as a calculator complete with the arithmetic operators and Use this mode when you need to do a lot of numeric data entry A better solution would be to connect an external keypad Scroll Lock Fn F12 When Scroll Lock is on the screen moves one line up or down when you press the up or down arrow keys resp...

Page 22: ...Description Windows key Pressed alone this key has the same effect as clicking on the Windows Start button it launches the Start menu It can also be used with other keys to provide a variety of functions Tab Activates the next Taskbar button E Opens the My Computer window F1 Opens Help and Support F Opens the Find All Files dialog box R Opens the Run dialog box M Minimizes all windows Shift M Undo...

Page 23: ... in Sleep mode Fn F5 Display toggle Switches display output between the display screen external monitor if connected and both Fn F6 Screen blank Turns the display screen backlight off to save power Press any key to return Fn F7 Touchpad toggle Turns the internal touchpad on and off Fn F8 Speaker toggle Turns the speakers on and off Fn Volume up Increases the sound volume Fn Volume down Decreases t...

Page 24: ...ld Alt Gr and then press the 5 key at the upper center of the keyboard Note Some fonts and software do not support the Euro symbol Please refer to www microsoft com typography faq faq12 htm for more information The US dollar sign 1 Open a text editor or word processor 2 Hold Shift and then press the 4 key at the upper center of the keyboard Note This function varies according to the language setti...

Page 25: ...the emergency eject hole Using a computer security lock A security keylock notch located on the left hand side of the computer lets you connect a Kensington compatible computer security lock Wrap the computer security lock cable around an immovable object such as a table or handle of a locked drawer Insert the lock into the notch and turn the key to secure the lock Some keyless models are also ava...

Page 26: ...ith 16 bit high fidelity AC 97 stereo audio and dual stereo speakers Adjusting the volume Adjusting the volume on the computer is as easy as pressing some buttons See Hotkeys on page 14 for more information on adjusting the speaker volume ...

Page 27: ...to control all of your PC s power schemes and maximize battery life Acer eNetManagement on selected models Helps you to quickly and easily connect to networks in a variety of locations Acer ePresentation Simplifies resolution settings when connecting to a projector Acer eRecovery Creates backups and recovers system configurations reliably Acer eSettings Makes managing system settings and security ...

Page 28: ... allows you to set the four launch keys located above the keyboard Launch keys on page 10 for the location of the launch keys You can access the Launch Manager by clicking on Start All Programs and then Launch Manager to start the application ...

Page 29: ...ement system automatically blanks the screen to save power Press any key to turn the display back on If pressing a key does not turn the display back on three things might be the cause The brightness level might be too low Press Fn increase to adjust the brightness level The display device might be set to an external monitor Press the display toggle hotkey Fn F5 to toggle the display back to the c...

Page 30: ... a pen or paperclip and push to eject the tray The keyboard does not respond Try attaching an external keyboard to a USB 2 0 port on the computer If it works contact your dealer or an authorized service center as the internal keyboard cable may be loose The infrared port does not work Check the following Make sure that the infrared ports of the two devices are facing each other 15 degrees a maximu...

Page 31: ... Connection setup I want to restore my computer to its original settings without recovery CDs Note If your system is the multilingual version the operating system and language you choose when you first turn on the system will be the only option for future recovery operations This recovery process helps you restore the C drive with the original software content that is installed when you purchase y...

Page 32: ...ized service centers is in this handy booklet Read this passport thoroughly Always have your ITW passport on hand especially when you travel to receive the benefits from our support centers Place your proof of purchase in the flap located inside the front cover of the ITW passport If the country you are traveling in does not have an Acer authorized ITW service site you can still get in contact wit...

Page 33: ...____________________________ Address ___________________________________________ Telephone number _________________________________ Machine and model type ____________________________ Serial number ______________________________________ Date of purchase ___________________________________ ...

Page 34: ...ylus for pen based input Software developed specifically for the computer allows for both handwriting recognition converted to application text or handwriting captured as rich digital ink for manipulatio editing and formatting Writing in Tablet mode To write in Tablet mode follow the steps below 1 Slide the latch to the right a and lift the display screen in the direction as shown in the illustrat...

Page 35: ...n to an angle of about 90 degrees Rotate the display screen 180 degrees clockwise as shown in the illustration 3 With the screen facing away from the keyboard close the display cover and slide the lock lever to properly secure the screen ...

Page 36: ...put Acer soft button The Acer soft button is a radial control on the screen that manages program icons system settings utilities file folders and network locations Surrounding the central Acer logo are three levels of functionality levels 1 2 and 3 numbered from left to right ...

Page 37: ...press and hold the EMR stylus to the Acer soft button and drag it The top arrow 12 o clock position vertically flips the display output 180 degrees What was at the top of the screen will now be at the bottom Press the icon as shown The left arrow 9 o clock position rotates the display 90 degrees counter clockwise This changes the output from landscape to potrait or vice versa Press the icon as sho...

Page 38: ...s entered Hibernation mode and is turned off If the power indicator is off but the Sleep indicator is on the computer has entered Sleep mode In both cases press and release the power switch to turn the computer back on Note that the computer may enter Hibernation mode after being in Sleep mode for a period of time Caution Avoid packing items next to the top cover of the computer Pressure against t...

Page 39: ...computer Moving around When you are just moving within short distances for example from your office desk to a meeting room Preparing the computer Before moving the computer close and latch the display cover to place it in Sleep mode You can now safely take the computer anywhere you go within the building To bring the computer out of Sleep mode open the display then press and release the power swit...

Page 40: ... you to plug in your computer while in the meeting room If the meeting room does not have an electrical outlet reduce the drain on the battery by putting the computer in Sleep mode Press Fn F4 or close the display cover whenever you are not actively using the computer To resume open the display if closed then press and release the power switch Taking the computer home When you are moving from your...

Page 41: ...greater than 10 C 18 F allow the computer to come to room temperature slowly If possible leave the computer for 30 minutes in an environment with a temperature between outside and room temperature Setting up a home office If you frequently work on your computer at home you may want to purchase a second AC adaptor for use at home With a second AC adaptor you can avoid carrying the extra weight to a...

Page 42: ... are safe but do not put the computer through a metal detector Avoid exposing floppy disks to hand held metal detectors Traveling internationally with the computer When you are moving from country to country Preparing the computer Prepare the computer as you would normally prepare it for traveling What to bring with you Bring the following items with you AC adaptor Power cords that are appropriate...

Page 43: ...ude hardware and software locks a security notch and passwords Using a computer security lock A security keylock notch located on the rear of the computer lets you connect a Kensington compatible computer security lock Wrap a computer security lock cable around an immovable object such as a table or handle of a locked drawer Insert the lock into the notch and turn the key to secure the lock Some k...

Page 44: ... at boot up Type the Supervisor Password and press Enter to access the BIOS utility If you enter the password incorrectly a warning message appears Try again and press Enter When the User Password is set and the password on boot parameter is enabled a prompt appears at boot up Type the User Password and press Enter to use the computer If you enter the password incorrectly a warning message appears...

Page 45: ... external devices to the computer read the following section Fax data modem Your computer has a built in V 92 56 Kbps fax data modem Warning This modem port is not compatible with digital phone lines Plugging this modem into a digital phone line will damage the modem To use the fax data modem port connect a phone cable from the modem port to a telephone jack Warning Please make sure that the cable...

Page 46: ... from the network jack on the left hand side of the computer to a network jack or hub on your network Fast Infrared The computer s Fast Infrared FIR port allows you to do wireless data transfer with other IR aware computers and peripherals such as PDAs mobile phones and infrared printers The infrared port can transfer data at speeds of up to 4 Mbps at a distance of up to one meter ...

Page 47: ...ch allows you to connect USB peripherals without taking up precious system resources IEEE 1394 port The computer s IEEE 1394 port allows you to connect to an IEEE 1394 compatible device like a video camera or digital camera See your video or digital camera s documentation for details ...

Page 48: ...rds CardBus improves on the 16 bit PC card technology by expanding the bandwidth to 32 bits Note Refer to your card s manual for details on how to install and use the card and its functions Inserting a PC Card Insert the card into the slot and make the proper connections e g network cable if necessary See your card manual for details Ejecting a PC Card Before ejecting a PC Card 1 Exit the applicat...

Page 49: ... adaptor 6 Turn on the computer The computer automatically detects and reconfigures the total memory size Please consult a qualified technician or contact your local Acer dealer BIOS utility The BIOS utility is a hardware configuration program built into your computer s BIOS Your computer is already properly configured and optimized and you do not need to run this utility However if you encounter ...

Page 50: ...y and insert a DVD movie disk then close the DVD tray Important When you launch the DVD player for the first time the program asks you to enter the region code DVD disks are divided into 6 regions Once your DVD drive is set to a region code it will play DVD disks of that region only You can set the region code a maximum of five times including the first time after which the last region code set wi...

Page 51: ...ng devices keyboard mouse floppy drive hard disk peripherals connected to the serial and parallel ports and video memory If no activity is detected for a period of time called an inactivity timeout the computer stops some or all of these devices in order to conserve energy This computer employs a power management scheme that supports the advanced configuration and power interface ACPI which allows...

Page 52: ...ug in an external USB or IEEE 1394 compatible optical disk burner before entering Acer eRecovery for optical disk related tasks Create backup You can create and save backup images to hard drive CD or DVD 1 Boot to Windows XP 2 Press Alt F10 to open the Acer eRecovery utility 3 Enter the password to proceed The default password is six zeros 4 In the Acer eRecovery window select Recovery settings an...

Page 53: ... them by using this feature 1 Boot to Windows XP 2 Press Alt F10 to open the Acer eRecovery utility 3 Enter the password to proceed The default password is six zeros 4 In the Acer eRecovery window select Recovery settings and click Next 5 In the Recovery settings window select Burn image to disk and click Next 6 In the Burn image to disk window select 01 Factory default image and click Next 7 Foll...

Page 54: ... steps below to change the password in Acer eRecovery 1 Boot to Windows XP 2 Press Alt F10 to open the Acer eRecovery utility 3 Enter the password to proceed The default password is six zeros 4 In the Acer eRecovery window select Recovery settings and click Next 5 In the Recovery settings window select Password Change Acer eRecovery password and click Next 6 Follow the instructions on screen to co...

Page 55: ...rror messages in alphabetical order together with the recommended course of action Error messages Corrective action CMOS battery bad Contact your dealer or an authorized service center CMOS checksum error Contact your dealer or an authorized service center Disk boot failure Insert a system bootable disk into the floppy drive A then press Enter to reboot Equipment configuration error Press F2 durin...

Page 56: ...glish If you still encounter problems after going through the corrective measures please contact your dealer or an authorized service center for assistance Some problems may be solved using the BIOS utility ...

Page 57: ...49 English English ...

Page 58: ...n be determined by turning the device off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the device and receiver Connect the device into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio televisi...

Page 59: ...s This Class B digital apparatus complies with Canadian ICES 003 Remarque à l intention des utilisateurs canadiens Cet appareil numérique de la classe B est conforme a la norme NMB 003 du Canada Declaration of Conformity for EU countries Hereby Acer declares that this notebook PC series is in compliance with the essential requirements and other relevant provisions of Directive 1999 5 EC Please vis...

Page 60: ...fect the proper functioning of your equipment If they do you will be notified in advance to give you an opportunity to maintain uninterrupted telephone service If this equipment should fail to operate properly disconnect the equipment from the phone line to determine if it is causing the problem If the problem is with the equipment discontinue use and contact your dealer or vendor Caution To reduc...

Page 61: ...omplies with minimum conditions for connection to its network It indicates no endorsement of the product by Telecom nor does it provide any sort of warranty Above all it provides no assurance that any item will work correctly in all respects with another item of Telepermitted equipment of a different make or model nor does it imply that any product is compatible with all of Telecom s network servi...

Page 62: ...ng conditions of correct operation at the higher speeds for which it is designed Telecom will accept no responsibility should difficulties arise in such circumstances 3 This device is equipped with pulse dialing while the Telecom standard is DTMF tone dialing There is no guarantee that Telecom lines will always continue to support pulse dialing 4 Use of pulse dialing when this equipment is connect...

Page 63: ... 8 If an extension cord is used with this product make sure that the total ampere rating of the equipment plugged into the extension cord does not exceed the extension cord ampere rating Also make sure that the total rating of all products plugged into the wall outlet does not exceed the fuse rating 9 Never push objects of any kind into this product through cabinet slots as they may touch dangerou...

Page 64: ...erving or disassembling this equipment 17 Avoid using a telephone other than a cordless type during an electrical storm There may be a remote risk of electric shock from lightning Laser compliance statement The CD or DVD drive used with this computer is a laser product The CD or DVD drive s classification label shown below is located on the drive CLASS 1 LASER PRODUCT CAUTION INVISIBLE LASER RADIA...

Page 65: ...horized by Macrovision and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Reverse engineering or disassembly is prohibited U S Patent Nos 4 631 603 4 819 098 4 907 093 5 315 448 and 6 516 132 Radio device regulatory notice Note Below regulatory information is for models with wireless LAN and or Bluetooth only General This product complies with t...

Page 66: ...1 893 applies to 5 GHz only List of applicable countries EU member states as of May 2004 are Belgium Denmark Germany Greece Spain France Ireland Italy Luxembourg the Netherlands Austria Portugal Finland Sweden United Kingdom Estonia Latvia Lithuania Poland Hungary Czech Republic Slovak Republic Slovenia Cyprus and Malta Usage allowed in the countries of European Union as well as Norway Switzerland...

Page 67: ... antenna for the integrated wireless LAN Mini PCI Card built in to the screen section and all persons Note The Acer wireless Mini PCI adaptor implements a transmission diversity function The function does not emit radio frequencies simultaneously from both antennas One of the antennas is selected automatically or manually by users to ensure good quality radiocommunication 2 This device is restrict...

Page 68: ...licensed service this device is intended to be operated indoors and installation outdoors is subject to licensing c Operation in 5 GHz band The device for the band 5150 5250 MHz is only for indoor usage to reduce potential for harmful interference to co channel Mobile Satellite systems High power radars are allocated as primary users meaning they have priority of 5250 5350 MHz and 5650 5850 MHz an...

Page 69: ...erence received including interference that may cause undesired operation The following local manufacturer importer is responsible for this declaration Product name Notebook personal computer Model number MS2161 Machine type TravelMate C31xxx SKU number TravelMate C31xxx x 0 9 a z or A Z Name of responsible party Acer America Corporation Address of responsible party 2641 Orchard Parkway San Jose C...

Page 70: ...ame of manufacturer Beijing Acer Information Co Ltd Address of manufacturer Huade Building No 18 ChuangYe Rd ShangDi Zone HaiDian District Beijing PRCE marking Contact person Mr Easy Lai Tel 886 2 8691 3089 Fax 886 2 8691 3000 E mail easy_lai acer com tw Declares that product Notebook PC Trade name Acer Model number MS2161 Machine type TravelMate C31xxx SKU number TravelMate C31xxx x 0 9 a z or A ...

Page 71: ...on indicator 9 security 35 setting up a home office 33 taking home 32 traveling internationally 34 traveling on local trips 33 troubleshooting 47 turning off iii connections network 38 D display hotkeys 15 troubleshooting 21 DVD 42 DVD movies playing 42 E error messages 47 Euro 16 F FAQ See frequently asked questions frequently asked questions 21 front view 2 H Hibernation mode hotkey 15 hotkeys 1...

Page 72: ...hooting 47 Q questions setting location for modem use 23 S safety CD or DVD 56 FCC notice 50 general instructions 55 modem notices 52 scroll lock 13 security keylock 17 35 passwords 35 speakers hotkey 15 troubleshooting 22 status indicators 9 support information 24 T touchpad 11 hotkey 15 using 11 12 travel international flights 34 local trips 33 troubleshooting 47 tips 47 U universal serial bus 3...

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