Just as the title says, no picture but backlight is working, no sound and the TV won't shut off with the power button or remote.
I have replaced the power supply and mainboard with one I purchased from TVpartsguy.com....however on further inspection I found that the mainboard is not the correct part number. Symptoms did not change at all with these "new" parts installed. I also tried my original mainboard with just the new power supply installed. Same. I seem to be getting all the correct voltages to the mainboard. So I moved on to checking the U33 regulator that I've read about here. It's reading 1.08, 1.87, 4.94 respectively on 1,2,and 3....which would indicate a problem. So just for kicks, I installed the new "wrong" board into it for a second time and measured the U33 on it....and voltages were very similar to my original board. (Also I've looked over all caps on both boards and cannot see any that are obviously damaged/bulged/leaking).
I've already ordered a few new regulators from digikey, because at this point I don't feel like I have much to lose by swapping them out.....but I'm hoping someone can shed a little more light on this for me. Should I be looking at something else or does it seem like I'm on the right track? I'm definitely no electronics repairman, but I have been able to stumble through a few repairs (like the control board on my Hobart welder!).
Any input would be appreciated.
I have replaced the power supply and mainboard with one I purchased from TVpartsguy.com....however on further inspection I found that the mainboard is not the correct part number. Symptoms did not change at all with these "new" parts installed. I also tried my original mainboard with just the new power supply installed. Same. I seem to be getting all the correct voltages to the mainboard. So I moved on to checking the U33 regulator that I've read about here. It's reading 1.08, 1.87, 4.94 respectively on 1,2,and 3....which would indicate a problem. So just for kicks, I installed the new "wrong" board into it for a second time and measured the U33 on it....and voltages were very similar to my original board. (Also I've looked over all caps on both boards and cannot see any that are obviously damaged/bulged/leaking).
I've already ordered a few new regulators from digikey, because at this point I don't feel like I have much to lose by swapping them out.....but I'm hoping someone can shed a little more light on this for me. Should I be looking at something else or does it seem like I'm on the right track? I'm definitely no electronics repairman, but I have been able to stumble through a few repairs (like the control board on my Hobart welder!).
Any input would be appreciated.
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