DataON DNS-2670, User Manual

Appendix

I

Before you Begin

Before removing the chassis cover, disconnect all power. Unplug the AC power 
cord; disconnect all peripherals, and all LAN lines. 

Make sure you have a stable, clean working environment. Dust and dirt can get into computer 
components and cause a malfunction. Many of the screws on the server are different sizes; 
use containers to keep screws and small components separated. 

Adequate lighting and proper tools can prevent you from accidentally damaging internal 
components. Most of the following procedures require only a few simple tools, including the 
following: 



  Philips screwdriver 



  flat-tipped screwdriver 



  set of jewelers screwdrivers 



  grounding strap 



  anti-static pad 

Troubleshooting Sequence

Installation Problem

Perform the following checks if you are troubleshooting an installation problem: 



  Check all cable and power connections (including all rack cable connections). 



  Unplug the power cord, and wait one minute. Then reconnect the power cord and try 

again. 



  Remove  all  added  options,  one  at  a  time,  and  try  to  power  up  the  system.  If  after 

removing an option the server works, you may find that it is a problem with the option or 
a  configuration  problem  between  the  option  and  the  server.  Contact  the  option 
vendor for assistance. 

If the system doesn’t power on, check the LED display. If the power LED is not on, you may 
not be receiving AC power. Check the AC power cord to make sure that it is securely connected. 

Troubleshooting External Connectors

Loose or improperly connected cables are the most likely source of problems for the system, 
monitor, and other peripherals (such as a printer, keyboard, mouse, or other external device). 
Ensure that all external cables are securely attached to the external connectors on your 
system. See 

1.1 System Overview 

for the front- and back-panel connectors on your system. 

Troubleshooting System Boot Issues

This document lists troubleshooting tips if your server does not boot up properly.