Video/Monitor Problems - HP Netserver LP2000r Service Manual

Chapter 5
b. Verify the circuit breaker for the AC power outlet is on.
c. If the breaker was off, check that all devices connected the Netserver share the same circuit
breaker and are the only devices on it. Reset the circuit breaker after reconfiguring the
devices, if need be.
d. Verify the AC power outlet is not faulty. Test it by plugging in a known-good device.
e. Verify the third-wire ground is isolated from other grounds and is at ground potential.
3. Verify all cable connections:
AC power cords from AC source outlet to server
◊ ◊ ◊ ◊
DC Power supply cables to all Netserver PCBs
◊ ◊ ◊ ◊
DC power supply cables to disk drives and/or mass storage cages
◊ ◊ ◊ ◊
4. If the fans aren't audible and the above steps are verified, check that power is getting to all fans.
HP Netservers have multiple fans. All fans run when power is turned on; all are off when the
power is off.
With the power supply connected to the system board, check the power supply's voltages.
5. If voltages are not present:
a. Turn off AC power.
b. Disconnect the power cords for 5 minutes in order to reset the power supply's circuitry.
Turn on AC power again. If power is still not getting to the system board, replace the power
supply (or power supply module on some Netserver models).
6. If power is getting to the fan but the fan isn't working, replace the fan (or replace the power
supply in Netserver models with fans incorporated in the power supply).
7. If the problem continues, replace the power supply module.
8. If, after replacing the power supply, the problem persists:
a. Remove all accessory boards, including any hard disk drive controller board or the video
board the customer might have installed, and reboot the Netserver.
b. Disconnect all mass storage power cords and cables (except those to the boot device) and
reboot the Netserver.
9. If the problem goes away, reinstall the original suspected part to verify that it is causing the
problem.

Video/Monitor Problems

Symptoms:
•
Nothing is displayed on the monitor.
•
The monitor is blank.
•
The wrong size characters appear on the monitor.
•
Colors are wrong or there are no colors on the monitor.
If you installed a video board and are not using the built-in video system, go to Step 12.
1. Review the Troubleshooting Checklist before you continue.
54
Troubleshooting