My Sharp Aquos LC-C4677UN won't turn on.

Try to I unpluged the power, push volume and channel down, pluged power again

While it's flashing unplug your TV from the main power source for 15 seconds,Then press Valume Up and Channel Up, while holding it plug the TV back in, you should see the TV Turn on. How to Reset Your Sharp LCD TV TV Repair

if it was a new tv you can ask the supplier for check up it was covered with warranty.

How are the power and opc lights blinking? Do they blink simultaneously or does one blink then the other? How many time do they blink per second? Also have you had it fixed yet? and if so what was done? I had a similar problem with my set.

You have a failed circuit board. As to which one that is the question.

Power supply board it dead.Replaced the power supply board should solved this problems.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board. .

Try unpluging it for 30 seconds and plug it back in. This is how some electronics are reset.

This is very common in sharp tvs.U turn it on.U get power on light stable right?U hear a click,one or twice,sometime tv is good right?Sometime POWER light and OPC light flashes?Push the power button on/off couples times will work, picture will come on.If keep trying off/on couples time after POWER and OPC flashes,don't ever stop and never get backlight and picture.Ur Video backlight board is dead must replaced.

it has problem in picture tube

I have the same issue. Please help us if anyone have the solution. With Great thanks.

I have the same problem with my 37" HP which is the same as Sharp Aquos, it's bad backlight inverter boards, the screen comes on for a second then nothing, no menu, no channel change indicator then turn it off and you hear the clicking of the power supply about 10 seconds after.