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COMPAQ 7500-Picture fades from top&bottom to centerAugust 25 2006 at 9:36 AM
No score for this post | Danyk (no login) |
| COMPAQ 7500 - screen is black. After 5 minutes, dark picture appears on top and bottom. Center strip is black. Then the picture fades in from top and bottom sides to center. after some time, picture becomes Ok. Seems it is NOT heating problem. Something in video amplifier? Or blanking circuit? As the top and bottom fades in first, seems like it is concerned with vertical deflection.
But one more strange thing: The picture dissapears when Degaussing. When the degauss-relay turns off, the picture fades in again.
Any advise? thanks, Danyk
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| Author | Reply |
danyk
(no login) | Re: COMPAQ 7500-Picture fades from top&bottom to centerScore 1.0 (1 person) | August 26 2006, 7:42 AM |
solved. it was 1000uF elecrolyt on SMPS secondary.
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Richard B
(no login) | Re: COMPAQ 7500-Picture fades from top&bottom to centerScore 2.0 (1 person) | August 27 2006, 7:22 PM |
Thanks for the follow up.
Rich
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