HP dx2310 - Microtower PC Service & Reference Manual page 75

Troubleshooting Without Diagnostics
Problem
Blank screen (no video).
Blank screen (no video)
(continued).
Ä
CAUTION: When attempting to resume from standby mode, do not hold down the
power button for more than four seconds. Otherwise, the computer will shut down and
you will lose any unsaved data.
Power LED is flashing
and computer will not
start.
D–4
Cause
Some software
applications, especially
games, are stressful on the
graphics subsystem.
Cause unknown.
Monitor is not turned on
and the monitor light is
not on.
The cable connections are
not correct.
You may have a screen
blanking utility installed or
energy saver features are
enabled.
Computer is in standby
mode.
You are using a fixed-sync
monitor and it will not sync
at the resolution chosen.
The VGA/BNC selector
switch on the monitor
(some models) is not
properly set.
Bad monitor.
Initernal error has occurred
and the computer is
flashing a code.
490778-001
Solution
1. Lower the display resolution for the
current application or consult the
documentation that came with the
application for suggestions on
how to improve performance by
adjusting parameters in the
application.
2. Add more memory.
3. Upgrade the graphics solution.
Restart the computer.
Turn on the monitor and check that the
monitor light is on.
Check the cable connection from the
monitor to the computer and to the
electrical outlet.
Press any key or click the mouse button
and, if set, type your password.
Press the power button to resume from
standby mode.
Be sure that the monitor can accept
the same horizontal scan rate as the
resolution chosen.
Set the selector switch to agree with
the cable connection.
Try a different monitor.
Refer to "Interpreting Diagnostic Lights
and Audible Codes" to interpret the
error code.
Service Reference Guide