Figure 3. Curved edge
Memory Errors
Memory errors on the system display the new ON-FLASH-FLASH or ON-FLASH-ON failure code. If all memory fails, the LCD
does not turn on. Troubleshoot for possible memory failure by trying known good memory modules in the memory connectors on
the bottom of the system or under the keyboard, as in some portable systems.
NOTE:
The DDR4 memory is imbedded in board and not a replaceable DIMM as shown and referred.
USB features
Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and
peripheral devices like mice, keyboards, external drivers, and printers.
Table 1. USB evolution
Type
Data Transfer Rate
Category
Introduction Year
USB 2.0
480 Mbps
High Speed
2000
USB 3.0/USB 3.1 Gen
1 Port
5 Gbps
SuperSpeed
2010
USB 3.1 Gen 2
10 Gbps
SuperSpeed
2013
USB 3.0/USB 3.1 Gen 1 (SuperSpeed USB)
For years, the USB 2.0 has been firmly entrenched as the de facto interface standard in the PC world with about 6 billion
devices sold, and yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands.
The USB 3.0/USB 3.1 Gen 1 finally has the answer to the consumers' demands with a theoretically 10 times faster than its
predecessor. In a nutshell, USB 3.1 Gen 1 features are as follows:
●
Higher transfer rates (up to 5 Gbps)
●
Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
●
New power management features
●
Full-duplex data transfers and support for new transfer types
●
Backward USB 2.0 compatibility
●
New connectors and cable
The topics below cover some of the most commonly asked questions regarding USB 3.0/USB 3.1 Gen 1.
Technology and components
7
Summary of Contents for Vostro 3881
Page 1: ...Vostro 3881 Service Manual Regulatory Model D29M Regulatory Type D29M002 August 2021 Rev A01 ...
Page 3: ...1 Major components of your system 3 ...
Page 4: ...Major components of your system 4 Major components of your system ...
Page 43: ...Disassembly and reassembly 43 ...
Page 60: ...60 Disassembly and reassembly ...
Page 63: ...Disassembly and reassembly 63 ...