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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Trinitron monitor faults
I have an AppleVision 850AV monitor, which uses a 20" Sony Trinitron tube.
It was made in late 1997. Over the last year it has developed a multitude of problems effectively making it unusable. 1. Image has lost focus. 2. Many resolutions and/or refresh rates (but not all) have developed a proportion problem. The image at the sides is very squashed whereas it is spread out at the centre. Some resolutions and/or refresh rates have ceased to work altogether, even if they are not out of range - screen goes blank and makes a weird noise. 3. Most annoyingly - the whole picture ripples all the time. The pixels basically jitter, and the monitor emits a buzzing sound. This occured recently and very suddenly, on all resolutions. I have taken the screen apart and looked at the Analog board. I found a charred bit and resoldered a couple of burnt contacts. Put it all back together but no improvement. 1 should be an easy fix, but what about 2 and 3? I have no idea where to begin. TIA. |
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