User's Manual
Quick User’s Guide 2–3
Troubleshooting
The unit temperature was 
exceeded. The fan may 
be blocked.
1. Unit is in an exceedingly hot 
environment. Let it cool down.
2. Ensure that computer air vents 
are not blocked and internal fan 
is running.
Contact Compaq authorized reseller 
or service provider.
Power-On Self Test 
(POST) displays an 
error.
For more detailed help refer to the 
troubleshooting information which is 
available on the Compaq Web site 
www.compaq.com/support (search 
for Evo D510 e-pc).
You hear a buzzing 
noise.
This is the pre-boot 
diagnostics capability 
feature. It detects 
problems with your PC.
1. Count the number of beeps after 
the buzzer.
2. Contact Customer Support.
Computer appears 
locked up and will not 
turn off when the power 
button is pressed.
Software control of the 
power switch is not 
functional.
Press and hold the power button for 
at least 5 seconds until the computer 
turns off.
Computer date and 
time display is 
incorrect.
RTC (real-time clock) 
battery may need to be 
replaced. Battery life is 
approximately 3–5 years.
First, reset the date and time under 
Control Panel. If the problem persists, 
replace the RTC battery. Refer to 
Appendix A, “Replacing the Battery”
for instructions on installing a new 
battery, or contact your Compaq 
authorized dealer or reseller for RTC 
battery replacement.
Computer powered off 
automatically. 
The unit temperature may 
have been exceeded. The 
fan may be blocked.
1. Unit is in an exceedingly hot 
environment. Let it cool down.
2. Ensure that computer air vents 
are not blocked and internal fan 
is running.
Contact Compaq authorized reseller 
or service provider.
Solving Minor Problems (Continued)
Problem Cause Solution
evo_d510_e-pc.book Page 3 Tuesday, July 23, 2002 5:10 PM










