HP PROLIANT 8500 Troubleshooting Manual page 7

5) Is there video on the monitor?
On the video monitor, does any graphics or text appear?
YES: If video is present, then follow any messages that are displayed on the screen (i.e. post
errors, etc.).
NO: If monitor is connected and no video is present, go to the next decision box (6).
6) Is the IMD on?
Is there something displayed on the IMD and the backlight ON?
NO: The IMD is not properly connected or not working. Check the following:
• Check the LCD cable and its connection between the IMD and the Media Bay
Module. (E8).
• Check for Aux 5v on the I/O board (CR47)
YES: If the IMD is on, it can provide useful information about the progress of the system during
post. Go to the next decision box (7).
7) Is there IMD activity?
IMD activity is defined by the IMD resetting and/or new messages being displayed. If the only
thing displayed is from an earlier message, then that doesn' t qualify as activity. Old information
on the IMD will remain as long as power to the IMD is there. The old messages "go away" when
the IMD is reset during normal boot process. Error logs don' t "go away" only the displayed
messages.
YES: If there is IMD activity, the progress through post can provide valuable information to
where possible problems are. Also error messages and alerts are displayed.
NO: If there is no IMD activity (it doesn' t reset or display POST progress), that is an indication
that the system is possibly not coming out of reset and that the processor(s) aren' t executing code.
(Note: The checking the CD-ROM drive for constant flashing Activity LED as an indication of
being held in Reset). Go to decision box 8 to continue zeroing in on possible problems.
8) Are all the Voltage Indicator LEDs ON?
Voltage Indicator LEDs are located on the I/O and Processor boards. However the ones on the
Processor board can not be easily viewed. Refer to Table 1 - 2
NO: If any of the voltage indicators LEDs are not ON, check the following for possible causes.
• Check the power supply pins for missing/bent pins.
• Reseat Memory Board in Processor Module.
YES: If all the voltage indicator LEDs are ON then the system may not be booting due to bad
VRM or processor. To determine who is at fault you may have to swap in a known good
processor or VRM.
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