Hi one last effort before this tv goes to a shop or the bin.
symptoms no picture only sound.
all the voltages are there apart from zbias which is 70v and the 18v rail which is only 4v. No green flashing light on logic board but logic board has been replaced 5v going to logic board.
Vy is 0v. resistors diodes are fine .
My mate who does all the diagnosing and soldering has given up.
In the attached photo he has checked everything in a yellow box and replaced everything in a double yellow box.
Main board is fine auto gen on logic board was connected -no test patterns generated.
Any pointers would be really be appreciated.
Thanks in advance Sorry about the repetitive postings.
symptoms no picture only sound.
all the voltages are there apart from zbias which is 70v and the 18v rail which is only 4v. No green flashing light on logic board but logic board has been replaced 5v going to logic board.
Vy is 0v. resistors diodes are fine .
My mate who does all the diagnosing and soldering has given up.
In the attached photo he has checked everything in a yellow box and replaced everything in a double yellow box.
Main board is fine auto gen on logic board was connected -no test patterns generated.
Any pointers would be really be appreciated.
Thanks in advance Sorry about the repetitive postings.
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