Multiple Viewsonic vx2835wm issues

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  • -jod
    New Member
    • Jul 2012
    • 8
    • United States
    #1

    Multiple Viewsonic vx2835wm issues

    Finally pulled out the seven vx2835wm's I got last year. With help from this forum I've replaced all the caps on the power boards including the big filter cap as well as the two suggested caps on the video boards. Five are now working.

    I know, I should probably cut my losses and dump the last two but I can't stop.

    So in testing, I have three bad boards (pics below). They were all tested in two of the good working monitors including all good cables. I tested the voltage with a DMM. The power boards unconnected and connected to a good video board.

    Power Board #1
    Power led works, black screen.
    5SB (unconnected) = 6.54v
    5SB (connected) = 6.04v
    24v (unconnected) = 0v
    24v (connected) = 0v

    Power Board #2
    Turns on, grey screen.
    5SB (unconnected) = 5.04v
    5SB (connected) = 5.04v
    24v (unconnected) = 0v
    24v (connected) = 0v

    Video Board
    Monitor turns on, gray screen.
    also replaced C135 as the bottom was popped.
    Not sure what to test on this one.

    Any idea where to go from here?

    -jod
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