19" LCD will only display for a second, technical advice will be appreciated

By et_man_4
Jun 20, 2005
  1. Hello,
    I ran a search to troubleshoot an LCD monitor but was unsuccessful, so here I am looking for help.
    I have a ST1904K1 19" LCD Flat Panel Monitor (Office Depot no brand, maybe Microtek). It will only display for less than a second when first turned on then the display disappears. I tried it on 3 different working computers. Turning the monitor off then on again I can see whatever program is running, but the display stays on for a split second then disappears. Any advice? Is it dead? Is it the back light? power board? a cap?
    Thank you
  2. howard_hopkinso

    howard_hopkinso TS Rookie Posts: 24,177   +19

    Hello and welcome to Techspot.

    I can`t give you any technical advice, but obviously, there is a major problem with your monitor.

    If it`s still under warranty, rma it.

    If not then take it to a qualified repair technician.

    Regards Howard :wave: :wave:
  3. et_man_4

    et_man_4 TS Rookie Topic Starter

    Thanks Howard
  4. aedmunde

    aedmunde TS Rookie

    19'' LCD Monitor (Black) - ST1904K1-N (Backlight failure)

    (mostly for thread closure)
    I pulled apart one of these over the weekend with the same symptoms. The display is live, but the backlight turns off after about 1 second on.
    It's not the powersupply or the lights, near as I can tell. (If you shine a light into the front of the display, you can see the screen is working).

    There are 4 HV power connections coming out of the powersupply cage, I'm not seeing voltage...

    I'm thinking that the firmware may be turning off the lights...

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