HP Pro 3330 Maintenance And Service Manual page 174

Table D-6
Blank screen (no video).
Cause
Computer is in standby mode.
Monitor cable is plugged into the wrong connector.
Monitor settings in the computer are not compatible with the
monitor.
Monitor is configured to use an input that is not active.
Blank screen and the power LED flashes Red five times, once every second, followed by a two second pause, and
the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Pre-video memory error.
Blank screen and the power LED flashes Red six times, once every second, followed by a two second pause, and
the computer beeps six times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause
Pre-video graphics error.
164 Appendix D Troubleshooting Without Diagnostics
Solving Display Problems (continued)
Solution
Press the power button to resume from standby mode.
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.
Systems may have a monitor connection on both the
motherboard or an add-in card. Try moving the monitor
connection to a different connector on the back of the
computer
1. In Windows XP Control Panel, double-click the Display
icon and select the Settings tab.
In Windows Vista or Windows 7 Control Panel, under
Appearance and Personalization, select Adjust
screen resolution.
2. Use the sliding control to reset the resolution.
Use the monitor's on-screen menu controls to select the
input that is being driven by the system. Refer to the
monitor's user documentation for more information on the on-
screen controls and settings.
Solution
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty
module.
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solution
For systems with a graphics card:
1. Reseat the graphics card. Power on the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graphics, replace the system
board.