HP 98770 CE Handbook page 16

4-4
98770 Troubleshooting
LED #3 Lit
±
IS or
±
2S Volt Supply overvoltage.
1. Unplug power cord.
2. Do AS and Power Supply procedure See Page 4-8.
3. Plug in and turn ON. If LED #3 still lit. go to minimum configuration tests.
LED #4 Lit
+
12 Volt Supply overvoltage.
1. Unplug power cord.
2. Do AS and power supply procedure See Page 4-8.
3. Plug in and turn ON. If LED #4 still lit, go to minimum configuration tests.
LED #5 Lit
AS heatsink temperature higher than 100° C.
1. Check air flow of internal fan (near bottom of heatsink) by holding hand above AS heat
sink.
2. No air flow. Unplug power cord.
3. Remove AS and try to rotate fan by hand.
a. If frozen (will not rotate), replace fan.
b. If it spins, disconnect the fan and check the voltage at the connector (2S Vdc). Check
the wiring to fan. See Page 9-3, 9-4, 9-S.
4. Do AS and power supply procedure See Page 4-8.
S. Plug in and turn ON. If LED #S still lit, go to minimum configuration tests.
LED #6 Lit
Switching transformer primary overcurrent.
1. Unplug power cord.
2. Replace power supply.
LED #7 Lit
- S.2 supply overvoltage.
1. Do AS and power supply procedure. See Page 4-8.
2. Go to minimum configuration tests, Page 4-S.
LED #8 Lit
+
S Volt supply overvoltage.
1. Replace AS board. See Page 4-8.
2. Go to minimum configuration tests. See Page 4-S.
Right Indicator Group
LED #1 or #2 or #3 lit.
1. Replace Power Supply.
a. Do AS and Power Supply procedure See Page 4-8.