Hi,
This plasma TV belongs to my married daughter and son-in-law. It apparently just stopped working whilst watching it. Still had stand-by light and would give a click when they tried to turn it on again, but would not come on.
When I took on the task of having a look at it - I never like to throw anything out without first determining that it is beyond economical repair - it was not showing any stand/by light at all.
The PCB is a Model PSPU-J902A. PSPU-J903A Rev 1.2 2009.06.29.
LG IT PCB P/N : 3PAGC00001A-R
EAY60696801 (PSPU-J902A)
EAY60696901 (PSPU-J903A)
My first step was to check the fuses on the various boards. I found fuse F302 to have no continuity, and all others were okay.
I replaced this fuse and tested it with a DMM and all was good. I then reinstalled the PCB and left the connector plug to the YSUS board disconnected(YSUS is connected to ZSUS with a separate cable).
When I turned on the mains at the wall, there was a 'pop' from the TV and I turned in time to see a small spark arc out from the vicinity of the power board and a little puff of smoke, before I turned the AC off again.
After studying the board for a while and testing all of the fuses again, I was unable to find anything wrong. I then turned the power back on and waited for a minute or so, half expecting to start a fire, but nothing happened.
I have no stand-by light and the TV will not turn on. As the fuse I replaced and all others test okay, and I can find no visible signs of something having exploded (causing a spark), nor any scorch marks etc., I am stumped.
I have been thinking about purchasing a new PCB, but I am concerned that if I do so I might blow it up (the new PCB), if there is a fault elsewhere in the TV.
My questions therefore are:
a. Is my concern about blowing up the new PCB warranted?
b. Is there anything I can do to remove that risk?
c. Are there any simple checks I can do on this old board to see if it is
repairable?
Any expert advice will be very gratefully received.
Thank you
This plasma TV belongs to my married daughter and son-in-law. It apparently just stopped working whilst watching it. Still had stand-by light and would give a click when they tried to turn it on again, but would not come on.
When I took on the task of having a look at it - I never like to throw anything out without first determining that it is beyond economical repair - it was not showing any stand/by light at all.
The PCB is a Model PSPU-J902A. PSPU-J903A Rev 1.2 2009.06.29.
LG IT PCB P/N : 3PAGC00001A-R
EAY60696801 (PSPU-J902A)
EAY60696901 (PSPU-J903A)
My first step was to check the fuses on the various boards. I found fuse F302 to have no continuity, and all others were okay.
I replaced this fuse and tested it with a DMM and all was good. I then reinstalled the PCB and left the connector plug to the YSUS board disconnected(YSUS is connected to ZSUS with a separate cable).
When I turned on the mains at the wall, there was a 'pop' from the TV and I turned in time to see a small spark arc out from the vicinity of the power board and a little puff of smoke, before I turned the AC off again.
After studying the board for a while and testing all of the fuses again, I was unable to find anything wrong. I then turned the power back on and waited for a minute or so, half expecting to start a fire, but nothing happened.
I have no stand-by light and the TV will not turn on. As the fuse I replaced and all others test okay, and I can find no visible signs of something having exploded (causing a spark), nor any scorch marks etc., I am stumped.
I have been thinking about purchasing a new PCB, but I am concerned that if I do so I might blow it up (the new PCB), if there is a fault elsewhere in the TV.
My questions therefore are:
a. Is my concern about blowing up the new PCB warranted?
b. Is there anything I can do to remove that risk?
c. Are there any simple checks I can do on this old board to see if it is
repairable?
Any expert advice will be very gratefully received.
Thank you
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