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Troubleshooting Symptom Charts/Video - 14
Video
Pixel never comes on
or is always on
Replace display or return computer to Apple.
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.
Note:
Perform the battery contact alignment procedure when
you replace a logic board. (See Additional Procedures)
Partial or full row of
pixels is always on or
never comes on
1 Check cables.
2 Replace logic board.
3 Replace display.