Filter
Top Products
Troubleshooting Symptom Charts/Power - 4
Power
Computer won’t
power up
1 If sleep LED is continually on, backup battery power has been
interrupted. Restart computer by holding down Shift-FN-
Control and power on key. Wait 5 seconds and press power on
key. If computer doesn’t restart, repeat 3–4 times.
2 Try known-good power adapter.
3 Try known-good, firmly seated, charged battery. Repeat once.
4 Connect power adapter and restart computer in 3–4 minutes.
5 Verify PMU cable is fully seated on I/O logic board.
6 Disconnect internal keyboard and try powering up unit. If unit
powers up, replace keyboard.
7 Verify that microprocessor card is seated firmly in connector.
8 Replace sound card.
9 Replace power supply card.
10 Replace PMU card.
11 Replace I/O logic board.
12 Replace microprocessor board.