Some time ago, I picked up a thrown out Samsung LE46C750R2K TV off the side of a street. It's back cover was opened so clearly somebody had a look at it and deemed it unrepairable. Nevertheless, I grabbed it, put it in my car and took it home.
On close examination, I found 2 of the tiny IC chips on the main board had a hole in it and was shorting to ground and so I concentrated on that but also checked the PSU for any signs of wrong voltages but there was none and all seemed to be in good order. I ordered a new main board, installed it onto the TV where it worked with the standby LED and Samsung chimes but with no picture (the screen stayed black) for minute or so before it shut off and died. A few second later I heard a pop but I wasn't able to ascertain which board blew as I was staring at the front of the TV.There's no sign of obvious damage on either board, but the power board was outputting 240V on the heatsink of which I did get a pretty nasty shock from. Incidentally, when I checked this yesterday to salvage a capacitor (see me other thread) the 240V was no longer present on the heatsink and all voltages measured fine.
Anyways, I changed the power and main board (keeping the same balancer board) and so far it seems work, with the Samsung startup and shutdown chime and the power switch is pressed and the backlight works. I've not tried connecting the main board to the T-Con before reaching out here for some advice first, seeing this TV had initially died a mysterious death and then killed a the first main board I ordered. Just in case, it was the T-Con that fried my first replacement main board
So the question is, if a T-con board is faulty, is there any likelihood of it killing the main board? Is there any way to test this without connecting it up?
The T-Con board is BN81-04160A. Is there a schematic for it so I can check the pinouts for obvious shorts.
On close examination, I found 2 of the tiny IC chips on the main board had a hole in it and was shorting to ground and so I concentrated on that but also checked the PSU for any signs of wrong voltages but there was none and all seemed to be in good order. I ordered a new main board, installed it onto the TV where it worked with the standby LED and Samsung chimes but with no picture (the screen stayed black) for minute or so before it shut off and died. A few second later I heard a pop but I wasn't able to ascertain which board blew as I was staring at the front of the TV.There's no sign of obvious damage on either board, but the power board was outputting 240V on the heatsink of which I did get a pretty nasty shock from. Incidentally, when I checked this yesterday to salvage a capacitor (see me other thread) the 240V was no longer present on the heatsink and all voltages measured fine.
Anyways, I changed the power and main board (keeping the same balancer board) and so far it seems work, with the Samsung startup and shutdown chime and the power switch is pressed and the backlight works. I've not tried connecting the main board to the T-Con before reaching out here for some advice first, seeing this TV had initially died a mysterious death and then killed a the first main board I ordered. Just in case, it was the T-Con that fried my first replacement main board
So the question is, if a T-con board is faulty, is there any likelihood of it killing the main board? Is there any way to test this without connecting it up?
The T-Con board is BN81-04160A. Is there a schematic for it so I can check the pinouts for obvious shorts.
