Question about Apple iBook G3 Clamshell (M2453B) Mac Notebook

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Ibook powers up but no video

Ibook powers up but there is nothing on the screen. Before, it was intermittent like a loose connection but now there is nothing. I've taken the thing apart and have the LCD removed.There is no evidence of a bad connection. I'm trying to find a schematic to locate the power wire coming into the LCD just to see if this is the problem. Any suggestions? It is not the clamshell

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Before disassembling the unit, the recommended way to diagnose a display failure is to use the appropriate adapter to connect the iBook to an external display or TV. If the external display shows an image, the internal display assembly is at fault; otherwise, it could be the graphics processor or logic board. This step may be more difficult now that you have your unit apart.
Two cable sets drive the display. One provides image signal, the other provides power to the backlight. It is common for them to fray where they run through the hinges. Either or both could be the cause of your problem. Another possibility is that your backlight has burned out, as it is nothing but a small fluorescent tube and they fail with age.

Posted on Oct 28, 2009

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