I have v193w acer desktop lcd screen suddenly it went black the blue light (( which mean that it's on and every thing works fine )) is on all the time but nothing appeared like the the screen is completly off .. from time to time it works but it turn of in few sec if it works....please help

I have v193w acer desktop? This trouble maybe power supply or inverter boards is defective.
first you can test the voltage of the multr,and then check which part is defective.From Wisiny.com can find those parts
if you have any question,please let us know email:[email protected],we sincerely hope we can help you!
you can also check this boards whether suit you:
8921EQIX 715G3350 1 2 Acer ADTV8921EQIX Power Supply Backlight Inverter

Ive had that problem recent, same monitor. Same months to be exact, though started around October 2010 then got worse. Do not send it back to Acer, I did and the cost was 20 bucks to ship to them and all I got was a note and monitor back saying they tested and then did Extended testing and found nothing. Not even had it for 1 year or 2 years to say, 3 year warranty. Just going to buy a new one and perhaps a LED from ASUS, the V stands for Value on Acer website, guess I got what I payed for. Think it was $166 I payed for this thing. It is shame, as its nice monitor but I cannot have it not trusty like this, cannot even play some games without it going off like this. Worst if I put the monitor in Graphics or Movie mode makes it worse it seems.