Hi,
I have an LG plasma that has sound but no picture, opened it up and checked voltages and they all seem ok, fuses an all boards are good, i then
noticed that the Y-sus board wans't getting warm like the other boards on the system.
Checking voltages across VSC and VS resistors on Y board i got only a few mV.
I then tried disconnecting the Y-Buffer boards and the results where as follow:
Without any Y-Buffers boards: VSC & VS on Y-Board Voltages OK
With only the Top Y-Buffer : VSC & VS on Y-Board mV
With only the Bottom Y-Buffer: VSC & VS on Y-Board Voltages OK - White Image with noise on about 1/4 screen bottom part
Now this led me to belive that the y-buffers where bad but i already replaced them and the problem remains.
Is it the Y-Sus board that is bad?
Any other diagnostic that i can do?
Thx in advance for any help
Vitor Ferreira
I have an LG plasma that has sound but no picture, opened it up and checked voltages and they all seem ok, fuses an all boards are good, i then
noticed that the Y-sus board wans't getting warm like the other boards on the system.
Checking voltages across VSC and VS resistors on Y board i got only a few mV.
I then tried disconnecting the Y-Buffer boards and the results where as follow:
Without any Y-Buffers boards: VSC & VS on Y-Board Voltages OK
With only the Top Y-Buffer : VSC & VS on Y-Board mV
With only the Bottom Y-Buffer: VSC & VS on Y-Board Voltages OK - White Image with noise on about 1/4 screen bottom part
Now this led me to belive that the y-buffers where bad but i already replaced them and the problem remains.
Is it the Y-Sus board that is bad?
Any other diagnostic that i can do?
Thx in advance for any help
Vitor Ferreira
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