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Fuse is blowing on power supply - Hitachi 42HDT79 42 in. Plasma Television

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A blown fuse is indicating a short in the power supply. The power board will most likely need replacement. You can get the replacement power supply board from www.tvcircuitboards.com

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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No power or light, plus power supply keeps blowing fuse


you have a short most likely on the power supply but could be on the mainboard, inverter board, av/input board. The T-con board is fused and should blow its fuse before blowing the fuse on the power supply. I'm going with a faulty power supply, most likely a shorted Mosfet.

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This set is a 50" plasma. first check the AC power fuse on the filter board then: if it is bad: check the power supply by marking and, removing all the cables; (so you can put them back in the correct spot) except the filter board to power supply cable; that connects to the Power supply board. Then: replace the blown AC fuse and, re-power: If the power supply blows the fuse: again, the power supply is bad and, must be replaced or, repaired. If the fuse does not blow: turn off the set then: on again, reconnecting and, disconnecting each board cable in turn, untill the fuse blows again this cable leads to the bad board; replace or, repair the board that blows the AC fuse every time the bad board is connected, irregardless of which other cable to the power supply may be connected also; or, not.

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The fuse blows all time on High Voltage Poewr Supply, on HP Color Laserjet 5550dn,

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1 Answer

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The fuse is located inside the ATX switch mode power supply and it is solder onto the circuit. There are dangerous voltages inside this power supply. I suggest you get a new switch mode power supply because failure of a component inside the power supply has caused the fuse to blow and replacing the fuse would most likely not fix the power supply.

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Hi i changed colour cartridge tried trial run printer died; changed fuse in plug; still no power any suggestions please


in the printer there is a power supply board.there is a same type of 3amp fuse on the power supply board.if there is any kind of overheating in the power then the fuse in the plug and fuse on the power supply board blows out.in some cases only fuse on power supply board blows out.this fuse is placed on the board for safety reasons.because in the older model printers when this short circuit problem was happening at that time whole board used to blow out.so in the new model of printer a fuse is placed on the board ,so if any overheating or any power outage or any short circuit occurs.the fuse blows out instead of whole power supply board. You just need to replace the fuse on the power supply board by disassembling the printer.the power supply board is the green color square shaped board.its the board to which your power wire of printer is connected. the fuse is available at any local electric hardware shop.its not any special kind of fuse. This will help. Thanks please keep updated. please please do rate the solution positively .thank you for using fixya

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1 Answer

Proscan lcd tv model 26lb30h blows fuse on power board


If the fuse blows again after replacing it, there's a shorted diode, bridge rectifier, capacitor or transistor in the power supply.
I repair these power supplies. If you need furhter assistance, write to jah2mil@hotmail.com

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1 Answer

Blowing fuses in power supply


One thing to check, would be the filter capacitator that is on the front circuit board. They are known to become shorted. The cap is fairly large, and may be mounted on the side of the circuit board that faces the front panel. Clip one lead, and apply power. If the fuse does not blow, then that is it. A second possible component, is the polarity protection diode, that is near the power jack, next to the fuse. If it is shorted, then the fuse will blow every time.

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1 Answer

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well first is there a fuse you state fuse available not that one is there -----the surge didnt blow the breaker or fuses either if currant made its way to your components --as to why fuse didnt blow --- no fuse ---surge came through ground --surge blew something before fuse blew your case blew power supply

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1 Answer

Koss 2503 blows fuses


You could be having problems with just that outlet  It might not be able to handle that much electricity.  Try the system on a different outlet.  If it still doesn't work, try the system on an outlet on a different fuse.  On an overloaded fuse something as simple as curling iron can blow a fuse.  If none of these work then it's probably a power supply issue.  If the power supply isn't grounding right, this could be causing the system to overload and blow a fuse.  The only way to fix this would be to replace the power supply; however, this might not be practical or possible.  I would suggest simply buying a new system, but if you're up to it go ahead and try to get a new power supply.

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