Hello all and happy New Year, I recently acquired this TV from a friend who stated "it's dead". I have had some success in the past restoring so I figured I would give this a go. I'm not an experienced electrician but I am comfortable using a meter and repairing pcb's. My lack of experience translates into difficulty diagnosing which is why I'm here.
Upon attempted startup the set does nothing but a very short and very faint one time logo flash if even that. Preliminary testing yields the following results.
Power board fuse = good
No bloated or leaking caps
Main cap 168v
Pins with main board disconnected
1 - 5.2v = 5.3
2 - " "
3 - " "
4 - gnd
5 - " "
6 - " "
7 - " "
8 - 12v = 0
9 - 12v = 0
10 -12v = 0
11 - p on/off = 0
12 - blo/off = 0
13 - lamp status = 0
14 - dimming = 0
Main board connected yields
Pins 1 through 3 = voltage rapidly fluctuating from 0 to 2.3v
Pins 4 through 14 = 0
Can hear a small tick from power board every 1-2 seconds from area to the right of main cap
Please advise as to what I can do to determine if this is a power or main board problem. Thanks in advance
Upon attempted startup the set does nothing but a very short and very faint one time logo flash if even that. Preliminary testing yields the following results.
Power board fuse = good
No bloated or leaking caps
Main cap 168v
Pins with main board disconnected
1 - 5.2v = 5.3
2 - " "
3 - " "
4 - gnd
5 - " "
6 - " "
7 - " "
8 - 12v = 0
9 - 12v = 0
10 -12v = 0
11 - p on/off = 0
12 - blo/off = 0
13 - lamp status = 0
14 - dimming = 0
Main board connected yields
Pins 1 through 3 = voltage rapidly fluctuating from 0 to 2.3v
Pins 4 through 14 = 0
Can hear a small tick from power board every 1-2 seconds from area to the right of main cap
Please advise as to what I can do to determine if this is a power or main board problem. Thanks in advance
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