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VAIO dotty display


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#1
white44

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VAIO PCG-K115Z

Display has vertical/horizontal bands of various cloured dots. Same problem using ext. monitor.

Problem exists on B/W display at boot up as well, although not in colour ( ragged display of words/numbers).

It started after son knocked computer, but not dropped.

LCD display replaced but still the same, but of course ext. monitor check would have proved this anyway if I hadn't jumped to hasty conclusion.

I don't know if comp was on when knocked, but if so could this have corrupted a video chip firmware?

Driving me mad and want to do some photos and artwork.

Thks. for any asst.

Graham
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#2
pip22

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From what you describe it does sound like a problem with the video-chip.
Video-driver corruption is also a possibility, which should be flagged up in Device Manager as a red exclamation mark so check that too.
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#3
white44

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No, nothing flagged.

What low level chip drives video on boot up, ie b4 windows loads?

I want to check board for physical damage, loose chip in (socket?) or hopefully one of those nasty flimsy ribbon connectors etc.

Thks. for so far.

Graham
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