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The power went off in my house for a few minutes. Everything is working fine except for my Sharp Aquos. Checked the power supply cord with a mulitmeter and that seems fine. I wanted to open the back and see if it's a fuse, but since I don't know anything about Televisions, I'm afraid I'll touch something and electrocute myself. Any idea or advice? Can I safely open the back of the Lcd without killing myself? Thanks!
Contrary to popular belief, the new LCD's are much simpler and much easier to work on than the old TV's, they're also much less dangerous. There should be a few screws on the back and pressure clips on the perimeter of the screen. That should free the back cover and you can take a look inside. There should be a 120VAC fuse right off the cord and a few fuses on the boards themselves.
There really should be only 3/4 parts in there: Power supply Board Tuner/sound/amplifier/speaker LVDS/Display board Inverter (runs the backlights, this is the only place to be worried about high voltage, it will discharge extremely quickly after disconnecting it, just watch out when it's powered on) Contrary to popular belief, the new LCD's are much simpler and much easier to work on than the old TV's, they're also much less dangerous. There should be a few screws on the back and pressure clips on the perimeter of the screen. That should free the back cover and you can take a look inside. There should be a 120VAC fuse right off the cord and a few fuses on the boards themselves.
There really should be only 3/4 parts in there: Power supply Board Tuner/sound/amplifier/speaker LVDS/Display board Inverter (runs the backlights, this is the only place to be worried about high voltage, it will discharge extremely quickly after disconnecting it, just watch out when it's powered on)
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If you open the TV set and find that the fuse is blown, it is possible that there is a defect in one of the power supplies. It is possible that the fault is the main power supply or a backplane supply.
When replacing the fuse and if it blows again, this means that there is a short. The cause of the short must be serviced to return the set to normal operation.
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If it is not doing anything, pitch black, might be the power supply. In any case, if you don't have the technical testing equipmente, there is not much you can do about a TV not turning on, except to take it to an authorized repair shop or call service to home
Few mins will not resetting tv and recovering power supply board from it protection modes that quick.Tries tv unplug,replug it back like about an hour later for tv resetting it back to the factory setting.The tv should get out it protections modes and might work again.If tv still have the same problems,than enough high currents got in the tv and kill ur tv power supply board.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.
I had a similar problem. Fleeting video, then audio only for few seconds and then nothing except the green power LED blinking on and off. I changed the power inverter board, backlight inverter boards and power supply board but still the problem is not gone.
Does this model have a removable power cord? Check to make sure that the cord is inserted fully if it this type. Also, Have you tried to turn on the set using the front panel control?...accordianman
Contrary to popular belief, the new LCD's are much simpler and much easier to work on than the old TV's, they're also much less dangerous. There should be a few screws on the back and pressure clips on the perimeter of the screen. That should free the back cover and you can take a look inside. There should be a 120VAC fuse right off the cord and a few fuses on the boards themselves.
There really should be only 3/4 parts in there:
Power supply Board
Tuner/sound/amplifier/speaker
LVDS/Display board
Inverter (runs the backlights, this is the only place to be worried about high voltage, it will discharge extremely quickly after disconnecting it, just watch out when it's powered on)
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