Hello,
I'm checking out a TV that belongs to a neighbor and it has no picture/sound/backlight when turned on.
At this point I'm thinking that there is a problem with the power supply. There are no visible signs of bad capacitors. When disconnecting the cable to the main board the backlight does not come on as some suggested happens in other threads with similar sets/Power supplies.
Voltage readings on CNM803 (A13V pins) continuously fluctuate, I thought my meter was bad and grabbed my backup and had the same readings.
Checking through the resistors on the board I came across two at R9007 and R9008 that tested as open. I can't seem to locate a schematic for the BN44-00807A power board and being a tad color blind makes reading these bands tough. Do resistors normally fail because of another faulty component?
Attached are pictures.
I was considering just purchasing a replacement board but thought if I could replace a couple of faulty components cheaper I would give that a shot first so if anyone can help me troubleshoot this I would appreciate it.
I'm checking out a TV that belongs to a neighbor and it has no picture/sound/backlight when turned on.
At this point I'm thinking that there is a problem with the power supply. There are no visible signs of bad capacitors. When disconnecting the cable to the main board the backlight does not come on as some suggested happens in other threads with similar sets/Power supplies.
Voltage readings on CNM803 (A13V pins) continuously fluctuate, I thought my meter was bad and grabbed my backup and had the same readings.
Checking through the resistors on the board I came across two at R9007 and R9008 that tested as open. I can't seem to locate a schematic for the BN44-00807A power board and being a tad color blind makes reading these bands tough. Do resistors normally fail because of another faulty component?
Attached are pictures.
I was considering just purchasing a replacement board but thought if I could replace a couple of faulty components cheaper I would give that a shot first so if anyone can help me troubleshoot this I would appreciate it.
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