I've been trying to figure out this 50" plasma for a couple of weeks. This one is stumping me because I've not seen this symptom and this TV doesn't have puffed caps like I usually see with this model.
Upon plug in, it attempts to power up, relay clicks a couple times, seems to go into shutdown, the led on the front doesn't light up. There is an LED on the power supply board (location: LED8001) that blinks green 10 times. According to the chart printed above that, it says: PROT. UVP: 8V6 VSND_POS, VSND_NEG. I don't know what this means. I've downloaded the chassis EJ3.0U PA service manual from Elektrotanya, but can't find reference to this LED or error code. Maybe someone else can? I tried to get a training manual linked in another thread on badcapsforum, but it wasn't available any longer.
Things I've tried/things I know:
---I found a thread talking about running test patterns off the logic by placing jumpers on it to see if the logic or main is causing a problem, but the result was it still shutdown with 10 blinks on the power supply board. I tried replacing the logic anyway and same symptom. I put the original logic back in.
---It has 5 volts standby
---I don't think it tries to develop VS or VA, but I can retest if anyone wants an exact report on what it does, but it didn't seem to even nudge my Fluke during it's power up attempt.
---I think I had tried unplugging the Y-SUS and Z-SUS to see if it would come out of shutdown, but I don't remember if that changed anything; I don't think it did.
---I can't find any bad fuses on the power supply, Y-SUS or Z-SUS
Any ideas out there? I usually am able to figure these out, but I'm stuck on this one.
Thanks so much!
I will post 8 pics of the TV and boards.
Upon plug in, it attempts to power up, relay clicks a couple times, seems to go into shutdown, the led on the front doesn't light up. There is an LED on the power supply board (location: LED8001) that blinks green 10 times. According to the chart printed above that, it says: PROT. UVP: 8V6 VSND_POS, VSND_NEG. I don't know what this means. I've downloaded the chassis EJ3.0U PA service manual from Elektrotanya, but can't find reference to this LED or error code. Maybe someone else can? I tried to get a training manual linked in another thread on badcapsforum, but it wasn't available any longer.
Things I've tried/things I know:
---I found a thread talking about running test patterns off the logic by placing jumpers on it to see if the logic or main is causing a problem, but the result was it still shutdown with 10 blinks on the power supply board. I tried replacing the logic anyway and same symptom. I put the original logic back in.
---It has 5 volts standby
---I don't think it tries to develop VS or VA, but I can retest if anyone wants an exact report on what it does, but it didn't seem to even nudge my Fluke during it's power up attempt.
---I think I had tried unplugging the Y-SUS and Z-SUS to see if it would come out of shutdown, but I don't remember if that changed anything; I don't think it did.
---I can't find any bad fuses on the power supply, Y-SUS or Z-SUS
Any ideas out there? I usually am able to figure these out, but I'm stuck on this one.
Thanks so much!
I will post 8 pics of the TV and boards.
Attached Files
I watched your excellent video. Glad you were able to solve that one. I'm going to pull this PS again and check those FETS. Do you think that I may find the same issue, even with a 10 blink code, not a 7 blink code as you had? I will check and let you know what I find.
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