DJschwar
New User
Dec 31, 2005, 7:33 AM
Post #2 of 3
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Re: [dyerblak1] Rca big screen wont turn on
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 Unplug the unit.
Check the Horizontal output transistor, which should be located near the "transformer" you are referring to, does this "transformer" have a thick wire (or three) coming from the top of it ( usually red)? That would be the flyback transformer. Close to this is a three-legged transistor, black, that is mounted up against a piece of metal (heat sink), to help keep it cool. as the picture shows, test resistance between all these legs and if they are are shorted, it's a goner. if not, you may have some bad capacitors in the power supply that are not discharging themselves and that's why sometimes when unplugged for a while, it will then work. as far as I know, someone else may have some better advice. But always unplugged the unit when doing ohms testing, also I find it best to use an analog meter with a needle (no lcd display) because it shows better ohm deflection and easier to test transistor. I usually do this test with the transistor in the circuit.
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