[B]Background[/B]
I recently fixed our Samsung black screen of death by watching YouTube videos and reading through previous threads. Removed a few ceramic capacitors and fixed a short on the back side of the tcon board. So my father and law asked me if I could try to fix his visio. He said that it wouldn't power on. When he first brought it to me I plugged it in and there was a standby light. When I hit the power button the TV booted up and everything worked. I hit the power button again and then I saw what he ment. Since then I have not been able to get it to power on or have a standby light.
I am still pretty new to board level repairs vs replacing. But this is the data I have gathered up.
Testing
Upon plugging in the TV and testing it in "standby mode" these are the results. I want to say after pressing the power button there was no change but I was tired so I can retest that if needed. I tested pins 1-15 on the power board side and then tested pins 1 - 15 on the main board side.
All of the capacitors on the power board look to be in good shape. On the other hand, on the main board I followed the traces from the pins and tested a few random capacitors that were near that area. For reference I circled the general area of ceramic capacitors in red that I randomly tested and they were shorted.
Next Steps?
Should I replaced the shorted ceramic capacitors and test from there? I don't know if they would keep the ps-on from registering or not. If not what would be my next steps forward? Also I attached a picture of my workbench thats the tools available to me to use.
I recently fixed our Samsung black screen of death by watching YouTube videos and reading through previous threads. Removed a few ceramic capacitors and fixed a short on the back side of the tcon board. So my father and law asked me if I could try to fix his visio. He said that it wouldn't power on. When he first brought it to me I plugged it in and there was a standby light. When I hit the power button the TV booted up and everything worked. I hit the power button again and then I saw what he ment. Since then I have not been able to get it to power on or have a standby light.
I am still pretty new to board level repairs vs replacing. But this is the data I have gathered up.
Testing
Upon plugging in the TV and testing it in "standby mode" these are the results. I want to say after pressing the power button there was no change but I was tired so I can retest that if needed. I tested pins 1-15 on the power board side and then tested pins 1 - 15 on the main board side.
- 1. NC (power side - 0) (main side - 0)
- 2. Ac-DET (power side - 3.85v) (main side - 3.36v)
- 3. PS-ON (power side - 3.37) (main side - 3.84v)
- 4. 12V-AU (power side - 12.43) (main side - 0)
- 5. GND (power side - 0) (main side - 0)
- 6. GND (power side - 0) (main side - 12.42v)
- 7. GND (power side - 0) (main side - 0)
- 8. 12V REG (power side - 12.43v) (main side - 12.42v)
- 9. 12V REG (power side - 12.43v) (main side - 0)
- 10. NC (power side - 0) (main side - 12.43)
- 11. through 15. both power and main side registered at 0
All of the capacitors on the power board look to be in good shape. On the other hand, on the main board I followed the traces from the pins and tested a few random capacitors that were near that area. For reference I circled the general area of ceramic capacitors in red that I randomly tested and they were shorted.
Next Steps?
Should I replaced the shorted ceramic capacitors and test from there? I don't know if they would keep the ps-on from registering or not. If not what would be my next steps forward? Also I attached a picture of my workbench thats the tools available to me to use.
Attached Files
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