Hello all,
I have a LG 50PV450 Plasma TV that was given to me. The manu date is 11/2011.
It has audio but no video. The Vs, Va and 5V from the SMPS look OK. On the Y-SUS board, the Vy- signal jumps to approx -190V then decays back to -25V at a 800ms duty cycle. So I figured the Y-SUS board was bad and replaced it. However, I still get the same results. I removed the Y-BUF boards and now see a steady signal on the Vy (-190V) and Vsc (150V) per the unit label. So are the Y-BUF boards bad? I'm thinking I should replace them as a set, correct? Thanks in advance for your help.
I have a LG 50PV450 Plasma TV that was given to me. The manu date is 11/2011.
It has audio but no video. The Vs, Va and 5V from the SMPS look OK. On the Y-SUS board, the Vy- signal jumps to approx -190V then decays back to -25V at a 800ms duty cycle. So I figured the Y-SUS board was bad and replaced it. However, I still get the same results. I removed the Y-BUF boards and now see a steady signal on the Vy (-190V) and Vsc (150V) per the unit label. So are the Y-BUF boards bad? I'm thinking I should replace them as a set, correct? Thanks in advance for your help.
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