Compaq 177620-006 Manual De Usuario

Troubleshooting Guide

Troubleshooting Without Diagnostics

Computer won’t turn on 
(Power LED on front of 
computer not on).

Computer is not 
connected to an 
external power source.

Connect to an external power 
source.

Cables to the external 
power source are 
unplugged.

Ensure that cables connecting the 
computer to the external power 
source are plugged in properly 
and the wall outlet is active.

Power switch not 
connected to the 
system board 
(supported on select 
models only).

Plug the power switch cable into 
the system board.

Power line selector 
switch on rear of 
computer chassis not 
switched to correct line 
voltage (115V or 230V) 
(some models).

Select the proper AC voltage using 
the slide switch.

Wall outlet is defective.

Test the outlet by connecting a 
different electrical device to the 
outlet.

Power LED flashes Red or 
Yellow every 2 seconds on 
most models.

Power supply 
overloaded or short 
was detected.

Unplug computer from AC power. 
Unplug internal power cables from 
all devices and unplug all PCI 
cards. Reconnect devices one at 
a time and turn power on to identify 
the cause.

Diskette drive power 
cable not properly 
connected.

When installing power cable to 
diskette drive, ensure that all 4 pins 
on the drive are connected to the 
power cable connector.

177620-006.book  Page 6  Thursday, March 14, 2002  3:16 PM