Troubleshooting; Power Lights; Beep Codes - Dell Vostro 420 Service Manual

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  Troubleshooting
Dell™ Vostro™ 420/220/220s Service Manual 
  Tools
  Dell Diagnostics
  Solving Problems
  Dell Technical Update Service
  Dell Support Utility
 Tools
 

Power Lights

 
CAUTION:
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
The power button light located on the front of the computer illuminates and blinks or remains solid to indicate different states:
 If the power light is blue and the computer is not responding, see
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 If the power light is blinking blue, the computer is in standby mode. Press a key on the keyboard, move the mouse, or press the power button to
l
resume normal operation.
 If the power light is off, the computer is either turned off or is not receiving power.
l
 Reseat the power cable into both the power connector on the back of the computer and the electrical outlet.
¡
 If the computer is plugged into a power strip, ensure that the power strip is plugged into an electrical outlet and that the power strip is turned
¡
on.
 Bypass power protection devices, power strips, and power extension cables to verify that the computer turns on properly.
¡
 Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
¡
 Ensure that the main power cable and front panel cable are securely connected to the system board (see
¡
 If the power light is blinking amber, the computer is receiving electrical power, but an internal power problem may exist.
l
 Ensure that the voltage selection switch is set to match the AC power at your location, if applicable.
¡
 Ensure that the processor power cable is securely connected to the system board (see
¡
 If the power light is steady amber, a device may be malfunctioning or incorrectly installed.
l
 Remove and then reinstall the memory modules (see
¡
 Remove and then reinstall any cards (see
¡
 Eliminate interference. Some possible causes of interference are:
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 Power, keyboard, and mouse extension cables
¡
 Too many devices on a power strip
¡
 Multiple power strips connected to the same electrical outlet
¡
 

Beep Codes

Your computer may emit a series of beeps during start-up if the monitor cannot display errors or problems. For example, one possible beep code may consist
of three short, repeated beeps indicating that the computer has encountered a possible system board failure.
If your computer emits a series of beeps during start-up:
 
1. Write down the beep code.
 
2. Run the Dell Diagnostics to further identify the problem. (see
 
Code
(repetitive
short beeps)
1
Great user manuals database on
Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
PCI and PCI Express
 
 
Description
Suggested Resolution
BIOS checksum failure.
Contact Dell (see
Possible system board
failure.
UserManuals.info
Beep
Codes.
System Board
Replacing or Adding a Memory
Module).
Cards).
Dell
Diagnostics).
Contacting
Dell).
System Board
Components).
Components).

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