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Re: 3 amp fuse blows every time
First if you have a can of air or air compressor blow out back if using an air compressor dont blow directly on stuff up close and dont let to much air out at once then if you have another 3 amp try it if not around the prongs wrap aluminum foil around them to were they all connectput it back in then it should work
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Most likely the storm did damage to the power supply board (the G board in a Sony) which is part number A-1316-388-A for your TV. However the board is no longer available..It most likely has a bad regulator and possibly rectifiers on that board that are shorted. Complete board replacement would be the best solution.
Yes, apparently fuse is blow off. You need to take off back cover of TV and follow AC cord to reach on power supply board. Get service manual from Manual Zone for small fee, if you need detailed technical info and schematics of TV.
Solved by resoldering some solder joints!!!!!!!
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001
Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852
Symptoms January, 2009:
Upon turning on set I got flashing red power light and nothing else.
Removing plug for one minute and plugging in results in:
Audible click, steady red power light for 2 seconds then slow flashing red light
Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
Removing power cord for several hours and plugging back in made no change
Audible click, steady red for about 2 seconds then slow flashing red light
Possible related note:Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
Fuses F850 and F852 found blown
PD0074 DEF/CON Power Board
There are two main power supply capacitors in this set.They are C-809 and C-810.One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time.When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
Replaced blown fuses F850 and F852.
I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
Already owned Service Manual and Circuit diagrams from a different 2004 repair.
Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
Some solder. Already owned de-soldering tools, etc.
Visited both local authorized Toshiba factory service repair facilities.One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU!Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.
if there is no indication of flashing or green light when you plug and try to turn it in this indicates no power to processor. the main fuse is more than likely blown. now this fuse is on a small board that is in front of the green board. just follow the plug in... NOW this board that the fuse is on is known as mains input board. WARNING THIS BOARD CAN AND DOES GENERATE 340 VOLTS DC. AND THIS VOLTAGE CAN BE THERE AFTER U UNPLUG IT. i repair alot of these and parts on this board short causeing fuse to blow. problems can range from plug up to standby my recomendation is if you put qa 6.2 amp fuse in and it blows again ...seek a technician
Take off back cover. The problem power board is to the right of the
board where the power plug feeds into the TV. There is a large white
fuse right bend the power plug. With a meter it read ok; about 8 inches
deeper into the TV on that board was the resister next to two fuses. My
4 amp 125 volt fuse did not read on my meter. After replacing, it
worked fine. Check all three fuses while you're in there.