benq fp91g+ (q9t4) monitor not turn on

Discussion in 'Computing and Networks' started by paulmars, Apr 16, 2013.

  1. paulmars

    Thread Starter Active Member

    May 13, 2010
    benq fp91g+ (q9t4) monitor. Mostly wont turn on. Once in awhile it does
    and works fine. However, that's very seldom. The on off switch hot side
    is 3.3vdc. The switch grounds that when its pressed and my dvm then
    reads 0vdc. Every time. Ive traced it to the display circuit board
    plug, gray wire. So, it goes from 3.3vdc to 0vdc when the switch is
    pressed - Every time. Over and over I can do this and every once in
    awhile, the unit powers up and it works fine. however, the next time,
    it wont power up.

    Any ideas what could be wrong? All the caps look fine. Ive also
    inspected all solder joints.