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LG 42LH20 42 in. HDTV LCD TV Questions & Answers
I have an LG 42LH20. I and a friend were messing
It sounds like bad timing...the TV just happened to fail while you were messing with it.
There's a good chance you have failing electrolytic capacitors either in the power section or the inverter section or both.
Any caps in these sections that look bulged at the top, or bulged/leaking at the bottom need to be replaced.
If you aren't tech savvy, this unit needs to go in for repair.
If you are handy with a soldering iron and can identify the power supply
and inverter / FM section for the backlights, an inexpensive handful of
capacitors will likely fix you right up.
Match the capacitance on the capacitors. Go over voltage if you can, and still have them fit.
IE - it's not a bad idea to replace a 10V cap with a 16V, but don't
replace a 680uF cap with a 500uF or a 1000uF (unless you are positive
it's only doing ripple filtering).
My LG TV won't turn on. Model #: 42LH20... I've
Perhaps an easy fix. Remove the back of the flat screen. There will be
a main circuit board visible. There will be several capacitors,
cylinders
with a cross hatch on the silver top. Do any of them look like they
have a dimple created by expansion of the internal capacitor material
over heating?
If you see an expanded top...that's probably your problem. Get your
solder gun out and replace that capacitor. You can order a new one off
of Amazon. If yours is a 10 volt capacitor, consider replacing it with a
16 volt unit. Generally the electronics companies under design the
size of these units. When you replace the capacitor take note of the
silver band on the unit and where its placed in the two socket
holes....there is a
positive and negative hole placement.
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