Question about ViewSonic VA800 17.4" Flat Panel LCD Monitor

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Va800 streaking white after text

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This issue presents itself in different ways in this monitor, in the form of smeary video, or color changing from the left to right, or as you indicate, a smear following text. I know this as I own this monitor, and have repaired this myself. There are three 1 mf capacitors, surface mounted on the control board inside the monitor that fail. They are in the RGB input lines, and when they fail they cause distortion of the RGB signals, causing what you see. They are the three caps you will find in a row, spaced maybe 14mm on the board between the VGA connector and the processor chip. I would replace all three, observing polarity markings. You can get by just fine using old-style thru-hole caps, just form and clip the leads and solder 'em down on the surface-mount pads. I highly recommend proper soldering tools for this job though, especially for the removal of the old parts, they don't want to come off unless you can heat both pads at the same time.

Posted on Dec 14, 2008

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This issue presents itself in different ways in this monitor, in the form of smeary video, or color changing from the left to right, or as you indicate, a smear following text. I know this as I own this monitor, and have repaired this myself. There are three 1 mf capacitors, surface mounted on the control board inside the monitor that fail. They are in the RGB input lines, and when they fail they cause distortion of the RGB signals, causing what you see. They are the three caps you will find in a row, spaced maybe 14mm on the board between the VGA connector and the processor chip. I would replace all three, observing polarity markings. You can get by just fine using old-style thru-hole caps, just form and clip the leads and solder 'em down on the surface-mount pads. I highly recommend proper soldering tools for this job though, especially for the removal of the old parts, they don't want to come off unless you can heat both pads at the same time.

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