TV original came to me with no power, no LED, no sign of life whatsoever. I took some initial voltage measurements and found the SN board had multiple shorted components on the board and I found a replacement cheap enough so I replaced the SN board. I also bought and installed a repair kit for the main power supply board. Now, the TV shows some signs of life, but it still isn't there yet. I scoured through all of the threads here about this model, but haven't found anything similar to this particular problem. Here is what it is doing now:
When I plug in the TV to power, I hear the relay click and a few seconds later, click once more. I can press the power button and the relay will click again and the LED turns green and remains on. There is no video on the display or even a slight glow. Just totally black.
Taking measurements of the various voltages, I find that all of them are present except for 24/15V measured at J1624 on the analog control/power board (which is where I assume I should be taking all of the voltage measurements anyway because I can't find printed values for the voltages or test points on the main power board. The analog control board/power board is the only one with printed values at the various jumper pin sites.)
The two main 450V 100uF filter caps marked as CE202 and CE201 both measure at 167.4V across their legs while the TV is powered on. All 3 fuses are not open.
My specific chassis model is DP42740-05 J4HGE. I cannot find a service manual specific to this chassis model, so I am using one I found for DP42740-00 J4HE which is a bit different that mine.
Not really sure where to go from here. Was hoping someone could help. Thanks guys. Attached pics
When I plug in the TV to power, I hear the relay click and a few seconds later, click once more. I can press the power button and the relay will click again and the LED turns green and remains on. There is no video on the display or even a slight glow. Just totally black.
Taking measurements of the various voltages, I find that all of them are present except for 24/15V measured at J1624 on the analog control/power board (which is where I assume I should be taking all of the voltage measurements anyway because I can't find printed values for the voltages or test points on the main power board. The analog control board/power board is the only one with printed values at the various jumper pin sites.)
The two main 450V 100uF filter caps marked as CE202 and CE201 both measure at 167.4V across their legs while the TV is powered on. All 3 fuses are not open.
My specific chassis model is DP42740-05 J4HGE. I cannot find a service manual specific to this chassis model, so I am using one I found for DP42740-00 J4HE which is a bit different that mine.
Not really sure where to go from here. Was hoping someone could help. Thanks guys. Attached pics
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