Suspect graphics card failure = pixel pattern on screen display

I am vainly hoping that it is not the case but I stongly suspect that the graphic card/chip is failing (on logic board).

- machine operates fine

- screen is distorted with regular patterned 'tramlines' running vertically. Desktop is virtually illegible as a result.

- same distortion occurs when plugging in an external monitor

I;m hoping that this my be a symptom of a loose connection btween the screen and graphic card. But I'm thinking not.

Greatly appreciate your input.

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Since the problem persists on an external monitor that rules out the cables and LCD. Sounds like a GPU (graphics card) failure. Here's your choice of logic boards: http://www.ifixit.com/Mac-Parts/PowerBoo...

or repair service: http://www.dttservice.com/powerbookg4al....

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Thank you Mayer. That's what I thought.

Sadly $450 and out of stock. Does't look like this Mac will get much more use!

RIP

Or maybe not: http://cgi.ebay.co.uk/PowerBook-G4-15-1-...

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The eBay unit looks very good.

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James Clark will be eternally grateful.
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