Specifications

Troubleshooting Symptom Charts/Power - 5
Screen is blank;
computer doesn't
respond
1 If sleep LED is continually on, backup battery power has
been interrupted. Restart computer by holding down reset
actuator 10-20 seconds. If computer doesn’t restart, repeat
3–4 times.
2 Restart computer.
3 Disconnect power adapter, remove battery, and restart
computer in 3-4 minutes.
4 Check power adapter cable.
5 Try known–good, charged battery.
6 Test fuse on logic board to make sure it is not open.
7 Try known-good power adapter. (See Power Information in
Basics chapter.)
8 Reset power manager.
9 Check all logic board cables and connections.
10 Replace keyboard.
11 Replace power supply board (5300 Series only).
12 Replace logic board.