Jun 29, 2010

Viewsonic ve710b

Picked up several monitors from a fellow who said they either worked for a few minutes and shut off or took a really long time to turn on, both signs of bad capacitors. Monitors are in excellent physical condition.

First here is the ve710b which is a 17", 1280x1024 max res, very clean looking monitor with a thin bezel, - typical office monitor, would be good for multiple monitor setups.

The first one of these I took apart took me forever as I didnt know how to take it apart, now I can recap one of these in less than 15minutes. You start by prying off the silver plastic covers over the screws that hold the base on (fold it back for easy access).

After removing the base and the front bezel (which clips to the back cover) you can unscrew 4 screws and remove the back cover as well.

Here it is flipped over and the back cover removed, you have to remove the little covers to disconnect the backlights and the lcd, then unscrew the four small screws holding everything to the lcd panel.

Here is everything with the panel removed, of all the ve710b's that I repaired none had problems with the display board so all you have to unscrew is the power board on the right (though you might have to unscrew a couple to get the power cable loose from the video board).

Front side of the power supply, you can see the bad capacitors by their bulged appearance. They were 2x 470uf 16v, 2x 1500uf 10v, 2x 1500uf 16v, and 1x 1000uf 10v.

New Nichicon capacitors installed, the 1000uf 10v was replaced with a 25v capacitor as I was all out of smaller ones.
Because of how many of these ve710b's I repaired I can attest that their were two different power supply versions used in this model, the second uses 4 of the smaller single bulb backlight connectors (manufactured July 05 and after) and in place of 2x 1500uf 10v = 1x 1000uf 10v, 1x 1000uf 10v = 1x 470uf 16v, 1x 1500uf 16v = 1x 470uf 25v - (oddly enough every time I replaced this capacitor with a new one the monitor would not work right even with all new caps everywhere else, so I ended up completely removing the 470uf 25v cap and have yet to have trouble with it missing)

I will get working pictures up when I post on the next monitor = Viewsonic va921b

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