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Troubleshooting Symptom Charts/Video - 15
Display is very light
or totally white
1 Adjust screen contrast and brightness settings.
2 Verify cable, inverter board, and logic board.
3 Replace inverter board (CPRC/Int’l only).
4 Replace display.
5 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.
Note:
Perform the battery contact alignment procedure when
you replace a logic board. (See Additional Procedure)
Display stopped
working or dimmed
but is fine now
1 If temperature is under 5° C or over 40° C, this reaction is
normal.
2 Let screen warm up for 30 minutes.