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Lcd screen flash briefly and then die

I have a BENQ LCD 19 ". screens flash briefly and then die but the lights remain green. what should I do?? capacitors nice all. transistor K3530, I'm not sure because I'm not good to check. transistor I try to buy it, but it nothing is selling in the market with it's serial number. could I replace it with another type transistor with the same function. please provide me with the same function transistors K3530 transistor.

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6ya6ya
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Posted on Jan 02, 2017

noone
  • 105 Answers

SOURCE: LCD Monitor is black... blowing transistors

Bulging or "blown" electrolytic capacitors are a common problem with LCD monitors. If you replaced them with correct parts (voltage rating) then one of two situations comes to mind:
1. Electrolytic caps are polarized, if you install them backwards they will blow quickly.
2. The voltage the circuit provides exceeds the rating of the cap. A 5 volt cap in a 12 volt circuit will blow quickly. The voltage regulation circuit may not be working.
Monitor Mike


Posted on Oct 02, 2008

budmrtn
  • 11361 Answers

SOURCE: Benq FP91G+ 19

If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed DELL (BenQ makes DELL monitors) monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Replacement board:
http://www.lcdrepair.us

Posted on Jul 11, 2010

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