Repairing LG 17LX1R LCD Television Power board
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crwdns2942287:0crwdne2942287:0This is a television/PC monitor that did not work after a storm. I expected to replace a few capacitors, but it only needed a single diode at the cost of twenty-nine cents and about an hour of labor. A new power board for this TV would have cost somewhere around $80.
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This is the LG 17LX1R that will no longer turn on.
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Remove the cover from the stand by.
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Press down on the two tabs. The cover should come off easily.
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Remove the four screws that hold the stand assembly to the chassis.
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Remove the four Phillips head screws that attach the stand to the chassis.
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Remove the eight Phillips screws that hold the back to the chassis. Once the screws are removed, the back will simply snap off.
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Remove the metal shield. It is fastened with six Phillips screws.
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After the shield is removed, the power board and the main board are visible.
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Power Board
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Main Board
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Fuse
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Thoroughly inspect the boards. Brown discoloration around Diode D102 is evidence of a short circuit, possibly a blown component.
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Disconnect all connectors from the power board
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Remove the four screws that mount the power board to the chassis.
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These are the chassis with the power board removed.
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Discoloration of the back side of the power board is a sign of a faulty diode.
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Unsolder the diode from the power board.
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Replacement diode
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Here is the removed diode. Description on the diode reads LT526 IN4007.
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Solder the new diode onto the power board. Use a pair of tweezers or hemostat to hold the diode in place while soldering.
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Once the diode is replaced, clean the board with isopropyl alcohol to get rid of any debris or old flux.
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Device powers on and has audio and video after the repair.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Very nice good job
good job my frend
great idea thats perfect
Hard repairing
