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TV made loud pop and went completely dead no power

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Heard loud sharp pop, screen went completely dead. Cannot turn on, no lights no sound. Waited then cracked the back. Can see obvious damage as shown in photos. I cannot locate a blown fuse. I do have a multimeter available I do not know what the burned looking items are, how to remove them (other than with pliers?) or where to get them to replace them. Please help! Thank you in advance!

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Hi @pbeutel ,

What is the model number of the TV?

da

sorry for the delay the model of the TV is 55LF5700

da

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The worst-hit component is Q9100, a snubbed cap (not a fuse!). That will need to be replaced. The resistor next to it should be still fine. Don’t remove the cap with pliers, as that can cause serious damage. You will need to desolder it (a normal iron will work fine. You might be able to find a replacement on DigiKey. Also, if that is a power supply board, be extremely careful, as they can be dangerous to work on.

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BTW, look for any shorts while you are at it, so this doesn't happen again!

da

@Suki-san

Bit confused when you say "....Q9100, a snubbed cap (not a fuse!)".

Presumably you mean "Q9100 and also the capacitor C9100 " and not that Q9100 is a snubbed cap?

Q9100 is a TF8N65 mosfet transistor and the capacitor C9100 (hopefully its markings are still OK on the other side of the component which will indicate type and value).

I would also check the resistor R9111 as it not only has scorch marks but also has cracks in the casing as well

da

I'll 2nd Jayeff. Depending on cost and access, a replacement PS is best. When the primary switching transistor in a switched mode PS lets go, he tends to take a lot of friends with him.

da

@jayeff, thanks for catching that!

da

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Patty beutel sarà eternamente grato.
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