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Troubleshooting Symptom Charts/Video - 17
No display, but
computer appears to
operate correctly
1 Press any key to wake computer from system sleep.
2 Adjust screen contrast and brightness settings.
3 Verify cable, inverter board, trackpad, keyboard, and logic
board connections.
4 Connect power adapter.
5 Replace inverter board (CPRC/Int’l only).
6 Replace display.
7 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.