Sharp Aquos LC-20B2U 20

Check and replace its tuner.

TV Parts Universal TV Stands DLP Chips ShopJimmy

if your TV lights the indicator when you power it on,, your problem is your back light is busted you can replace that and when the indicator not lights the problem is your power supply you can fix it by finding defective parts by using multimeter usually the trouble that i encounter to power supply is open/change value of resistor leak capacitor and shorted diode and transistor such as regulator you're always welcome

Check for busted fuse inside your TV, so you can switch it back on. So, open it up. Follow the power cord going inside your TV. The fuse is just near to it. Have it replaced, and have it carefully clean free from dust using 1/2 inch paint brush. Put the case back close, and plug it back to your outlet. Switch it on. Hope this
help you, and thank you for casting your vote.

I have the same problem. I fixed it for about 3 months by wrapping duct tape around the large pack midway in the cord (where the wall plug and TV line plug in). But, it started up again this week. I can't get the "box" open either, but that is where the problem is. Mine is mounted to the wall, so no one ever touches the cord. I'll let you know what we find when we get it opened.

There is no difference between a 125v and 250v fuse. The most important thing is the 2Amp. This fuse is probably the line fuse and could be the only trouble and may have blow with a line surge. Make sure the 2A you use is a Fast Blow Type. If it does blow again you most likely have a internal power supply failure.

I've been there I think.... You probably blown a 2 amp fuse inside on the DUNTKB128DE03 board. You are having a power issue inside and may need to replace the board. Check the fuse first.

Automatically tunes in and preset
receivable TV stations.
Make sure the antenna cable is
properly connected.
1 Press MENU (PRESET-1) on the
upper part of the LCD TV set for
more than two seconds. The
AUTO mode screen appears.
2 Press VOL (–)/(+) (PRESET-2)
on the upper part of the LCD TV
set.
All the TV stations in your area
that can be received by the LCD
TV set are automatically preset.
3 The screen shows whatever is on
channel 1 when full auto channel
preset is finished.

No can do the set cant deal with that signal. turn off prgressive scan on the DVD the signal is still a preaty good one. Only blue ray or HD DVD will get the real HD.

Look at the power board " the one with the fuse" for capacitors that look puffed at the top or leaking at the bottom. If these are leaky the voltage drop will cause the current to rise and pop the fuse. After a time the caps will get bad enough that the set will stop working and may cause more problems.