It is possible to replace just this circuit. The cheapest method is to just search on Google or eBay for a used one.
SOURCE: ViewsSonic n3000w sound working, but picture is not
Your inverter is bad. i think there's 8 transformers.. one for each backlight.. one of them is sorted and is bad.. if you know something about electrics you can try to find one transformer or you can try to find the whole inverter.. good place for parts is http://www.lcdparts.net
SOURCE: ViewSonic NextVision N4060w 40 in. LCD TV, will not turn on.
While this isnt an exact fix at work, you will at least be able to view your tv. We have one at work that would do nothing when you hit the power on button, just the usual geen led flashing. We pulled the cover off and found the bulging caps, more than likely from brown outs. But we also found that none were holding a charge. So we held the power button on for at least five min, after the led would stay on for about 30 sec and then turn off. We kept hitting the power button and the screen would try to come on. It finally did. After it did come one we can power on and power off aslong as we dont turn it off for more than 10 min. After 10 min of it being off we have hold down power button again and start the whole process again. So the main problem i believe is the caps arent holding a charge, to be able to kick the high voltage circuit on. We did not replace any caps but if we do end up changing parts will post what was changed and cost. Hope this helps
SOURCE: Viewsonic LCD TV n3251w problem
If the TV will not turn on and you do not have a "red" power indicator light you will need to replace or fix the power module. This is easy to replace, approx 125 USD, but also can be fixed. I fixed mine for about 1.97 USD with parts from Radio Shack.
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SOURCE: all buttons on tv stopped working only turns ON no ...
There is a button lock in the menu of the television. Using your remote access the menu screen and unlock the buttons.
Two vies of the power baord to your TV is attached here. This board can be purchased either from the authorised service center for Viewsonic at your town, or from any electronic sparepart selling shops at your town.
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