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Troubleshooting Symptom Charts/Power - 6
Power
Screen is blank;
computer does not
respond
1 Disconnect power adapter, remove battery for 3 minutes,
then reinstall battery.
2 Press rear power switch.
3 Reset power manager.
4 Try known-good, charged main battery.
5 Check all logic board cable connections.
6 Replace logic board.
Note:
When replacing the logic board, check that the serial port
EMI clip is attached to the bottom of the CPU stiffener. If it is
missing, replace the stiffener. On international units, also
replace the stiffener if the modem EMI clip is missing. The “CPU
Stiffener” topic in Take Apart helps you locate and identify the
two EMI clips.