Question about Hannstar I-Inc TW-191D Monitor

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My TW191D Monitor will not power on. It was sudden and there was no indication that there was a problem developing. It happened after a power outage, but not directly after it. Can anyone tell me what they think is wrong with my monitor and maybe what I can do to fix it. The manufacturer was not helpful at all. Thanks

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  • Anonymous Mar 26, 2009

    Situation is that monitor DOES have power going to it, the green light is on, indicating that the monitor is powered. However, I have a black screen, but if I turn the monitor off, and then repower it, the screen comes "on" for about 5 seconds, then goes off again. There is a very slight "hum" when the screen is actually displayed, no hum when there is no display.

  • Lou Ebert May 11, 2010

    Theelectr887, I can only guess that your monitor's power supply has stopped functioning. What kind of power supply do you have? internal? or small inline sitting on floor black box?? What happens to the led/on/off power button?? any light? How old is it? If you are not familiar with what are known as line operated "switch-mode" power supplys and know how to use a digital voltmeter(DMM) and possibly a 30mhz oscilloscope with isolation transformer, then you have very few options to deal with. Option A: Find out if manufacturer has swapout program. you send dead monitor and some cash. They send you a REFURBISHED same model in return. cost $ 40 to $ 90.

    Option B: Locate local TV/Audio/Video/Monitor Repair shop that knows all about CCF tubes, power supplys (both Switch-mode and INVERTER types) and knows enough stuff not to destroy his/her $1200. oscilloscope while troubl shooting your $160. monitor. cost min $25.

    Hope this helps you. You have joined the ranks of thousands of others that have LCD monitor problems. Best of luck to you. I'm louie12fix on fixya. or lmistyrel @aol. com



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Maybe bad caps (capacitors) you need to be familiar with high voltage(200VDC iguess, here it is 400VDC) to do anything of your own.

It would be nice if all badcaps are bulged/leaking. Changing the lamps is a pain in the ass, i will try it myself with an 191d. But i have tried first the power supply with multimeter capable of 100kHz AC 200mV range. Better if you borrow an ESR meter capable of in circuit measurement and test all condensators.

Allways discharge, disconnect from pc, switch iMonitor on and pull wall plug, push ON button for safety. My 400V capacitor is then down to 7VDC (germany 230VAC mains). Or wait for 30 min, (i am not patient enough for that).

Posted on Aug 02, 2014


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SOURCE: I-INC TW191D Monitor is Stretched

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Posted on Mar 11, 2008

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