I get 8 blink code when I power on the TV. I have done some troubleshooting and observed the following:
SS-Board (TNPA5648-1)
- I have checked for transistor, diode, resistor shorts and everything looks fine.
- confirmed all cables are properly connected and continuity on the panel.
- when I remove the ribbon connection between SS board and A board (SS33/A33) the TV stays powered up and I measure the following on the SS board:
- TPVSUS = 210V, TPVe = 150V, TPSS1 = 60V
- A33 connector has 5V, 15V on the A-board side
- SC board LED is on and that side of the display appears happy
- C1, C2, C3 boards have 3.3 and VDA ~ 55V.
With SS33/A33 ribbon reconnected, the SS and SC LED's turn on and then turn off after 1 second.
- I confirmed VCC=5V on the buffer IC's, VDD=15V on the recovery buffer IC's.
- TPS0S8 = 5V on power up (~1s), and then goes to 0V once the unit powers down.
-Is it recommended to remove the SS33/A33 ribbon connection and feed an external 5V, 15V to the SS board to make troubleshooting easier, not sure if this is a good idea?
- I also considered shorting TPS0S8 to ground to see if the TV stays powered up.
Any help would be very much appreciated.
SS-Board (TNPA5648-1)
- I have checked for transistor, diode, resistor shorts and everything looks fine.
- confirmed all cables are properly connected and continuity on the panel.
- when I remove the ribbon connection between SS board and A board (SS33/A33) the TV stays powered up and I measure the following on the SS board:
- TPVSUS = 210V, TPVe = 150V, TPSS1 = 60V
- A33 connector has 5V, 15V on the A-board side
- SC board LED is on and that side of the display appears happy
- C1, C2, C3 boards have 3.3 and VDA ~ 55V.
With SS33/A33 ribbon reconnected, the SS and SC LED's turn on and then turn off after 1 second.
- I confirmed VCC=5V on the buffer IC's, VDD=15V on the recovery buffer IC's.
- TPS0S8 = 5V on power up (~1s), and then goes to 0V once the unit powers down.
-Is it recommended to remove the SS33/A33 ribbon connection and feed an external 5V, 15V to the SS board to make troubleshooting easier, not sure if this is a good idea?
- I also considered shorting TPS0S8 to ground to see if the TV stays powered up.
Any help would be very much appreciated.
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