I can not power on my lcd tv n4060w as pressing power button either on remote or tv. Prior to this problem, I have to hold the power button for a few minutes to have the unit power ON. Please let me know is that a power supply problem.
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Ur tv the LCD inverter board is dead.Replaced the LCD inverter board u will get ur picture back.Tries websites like Shopjimmy.com,Ebay.com to buy an refurbish LCD inverter board for the replacement.It a long board in shape.
The power supply board is dead.That the board where the power a/c cord go into it.Replaced the
power supply board ur tv will work again.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. http://en.wikipedia.org/wiki/Capacitor_plague Please post back what you find. If the tech installed a used power supply, it may be bad also. 3 years are typical for capacitors to go bad.
replace the c21 and c22 capacitors on the power supply. they are both 1500uf, 16 v. When you pull the back of the set, youll notice that they will be slightly bulging. be sure to order quality ones (105 degree, and reputable brand). Radio shack won't have them, so you'll need to probably go online. The caps are around $1 each. order a couple extra just in case. Digikey.com sells them. I recommend you use a low watt soldering iron (15 watt), desoldering braid and take your time.
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