Model A1139 / 1680x1050 screen resolution

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Laptop not coming on / nothing on display

I cannot get my PowerBood G4 to come on. It suddenly went dark after I watched a stream of videos on the internet. The caps lock key lights up and it sounds like it is on but there is nothing on the display.

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I've see two cases like this. First one was a bad RAM port development. It would boot from either of the chips but only when just one was in the working port. Both chips were good. The second worked when I reseated the RAM.

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Try booting from the install disk, could be a bad HDD.

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also- try connecting to an external display


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