HP 3000/9x9KS Series, Service Manual

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3-4 Troubleshooting
Power System Troubleshooting
Table 3-1 provides some initial power-on type troubleshooting suggestions. For other power system
problems, refer to the more detailed descriptions and procedures in this section.
Table 3-1. Power-On Troubleshooting
SYMPTOM ACTION
No front panel message
displayed and no sys-
tem operation. 1. If PowerTrust is installed
a. Check that the power output cable is connected from the PowerTrust (UPS)
output receptacle to the system AC input receptacle.
b. Check that the AC power cord from the UPS is plugged into the AC power
source receptacle.
c. Check that the UPS output switch is in the ON position.
d. The UPS AC Output indicator should be green (AC power is being supplied).
e. Disconnect the power cable from the system AC input receptacle. Disconnect the
AC power cord from the UPS, connect it to the system AC input receptacle, and then
plug it into the AC power source.
f. If there is a display on the panel, replace the UPS. Otherwise, continue to Step 2.
2. Check for AC power at the power source. Plug another device into the
receptacle. Check the circuit breaker or breaker panel. Reset the circuit breaker
if necessary.
3. If AC power is present and no display
a. Replace Power Monitor PCA.
b. Replace Power Supply.
c. Check internal cables, Power Monitor to front Panel.
d. Replace the system board
No front panel display
and the system is oper-
ating 1. If the operating system is running with no problems.
a. Shutdown the operating system.
b. Check internal cables, power monitor to front panel.
c. Replace the front panel.
d. Replace the power monitor card.
e. Replace the system system board.