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Hantarex Polo 21 - white dots - RESOLVED

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mjnman:

I have a crt hantarex polo 21 with white dots in the screen.
This is the video of how it looks:



Someone can help me or where to start checking?
thanks

grantspain:

check r240 and make sure the chassis earth screw on the top part of the frame is in place near the power socket

mjnman:

I resolved and I apologize...I attached VGA output edited cable in to board and the video was ok.
The problem was in the gbs-8100 VGA to CGA converter.

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