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I can ´t start my 190CW after the electricity was out for several time ?

Whatever I do, it doesn´t work

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Posted on Oct 02, 2008

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190cw brightness box wont leave the creen unless i hold down a button and keep it help down?!

I had this same problem. Check if your system time is correct; as I had problems with the motherboard battery, my Windows time kept resetting, once I set the correct time it worked OK.

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Problem is now solved. Unit works perfectly. If you have never tried working with surface-mount ICs I would skip it if I were you. This IC has over 100 pins on it. However the part is available from Samsung. Print this comment and take it to your local service centre along with your receiver. They should be able to repair the board unless they are wussies and cannot do surface-mount work.

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I have a problems with my Viewsonic vx2235wm, the On/Off button does not always make a good connection in turning off the monitor. I will push it and it will go off and then come back on immediately. The...

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My screen flickers on and off

I'm not sure if this is exactly the same issue or not. My monitor would not turn on. I'd get the green power led for half a second or so, then it would go off. No power. This is how I fixed it.
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I looked at the capacitors and noticed all five of the 470 uf, 16V, 105 C and both of the 1000 uf, 16 V, 105 C units were domed on the top. This is an indication of “Capacitor Plague.” “Capacitor Plague” is caused by the dielectric in the capacitor breaking down under excessive strain (voltage ripple/spiking and heat). This releases hydrogen from the dielectric which caused the capacitor to degrade. This eventually results in failure. I replaced all of the capacitors with 25 V, 105 C (the next higher voltage rating with the same temperature rating) caps.
I also replaced the 7.5 V Zener Diode connected to pin 6 of the PWM. This is ZD904 on my monitor’s power supply PCB but may be different on yours. The tech data is very bad and the Tech manual part numbering doesn’t match the numbers on the PCB. Since this is a surface mount diode, and since I couldn’t find one like it at my local supplier, I used a 5 watt (massively over sized for the application) 7.5 V unit and it worked. It does require some care in the soldering of it in place. I did this because I read about it in another post. I just took the shot and it worked.
In any event, having replaced the capacitors and that Zener Diode, the monitor is functioning again.
I hope this helps. Good luck.

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Sounds like you've done all the trouble shooting. If you just need that extra nudge, I would agree... it sounds like you'll be needing to shop for a new monitor.

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