The TV went out after a low voltage. I was watching it when I noticed an incandescent lightbulb went dim and the TV just turned off. After the service normalized I noticed the red light wasn't on and when I tried to power it a 5 blink error was displayed. I tried to power cycle it but nothing happened.
I been testing it (results in separate spreadsheet) and I have noticed:
- The service manual is useless.
- When plugged to the outlet the standby red light doesn't tuns on.
- When powered I can hear one or both of the relays clicking on and off as the standby light turns on white, after a second the light changes to red with a weird pattern (dim, off, dim, brightens, bright, off, bright, off), after that the 5 blinks error begins normally.
- LD_ERR and BL_ERR measure differently in the connectors even though they are on the same board.
Tried jumpering with three 1 kohm resistors POWER_ON, BL_ON and DIGITAL_STBY to STBY3.3V with the main board disconnected. I can hear both relays on G7 clicking and 60 VCD is present in the output to the led driver but it won't turn on the backlight. When turn off the power strip through the surge protector I can hear the relays clicking off one at a time. (I did this before kevinm34232 posted the service manual in his thread: https://www.badcaps.net/forum/showth...ht=KDL-65W850A and realizing the 5 blinks error isn't because of bad LEDs)
The SM indicates the failure could be in:
- panel module most likely
- Tcon board most likely
- G* board (doesn't specify if G6, G7 or both) less likely
- B* board less likely
- H* board (IR) less likely
The troubleshooting in page 26 indicates to check PANEL_VCC 12.5V at CN8001 on the B* board. If I check while the 5 blinks error is displaying it reads 0VCD but while powering on it peaks to over 11 VCD and drops. If the LCD panel could be dead throwing harnesses and boards at it isn't a viable solution. Are there any tests to diagnose the real problem? Thank you.
I been testing it (results in separate spreadsheet) and I have noticed:
- The service manual is useless.
- When plugged to the outlet the standby red light doesn't tuns on.
- When powered I can hear one or both of the relays clicking on and off as the standby light turns on white, after a second the light changes to red with a weird pattern (dim, off, dim, brightens, bright, off, bright, off), after that the 5 blinks error begins normally.
- LD_ERR and BL_ERR measure differently in the connectors even though they are on the same board.
Tried jumpering with three 1 kohm resistors POWER_ON, BL_ON and DIGITAL_STBY to STBY3.3V with the main board disconnected. I can hear both relays on G7 clicking and 60 VCD is present in the output to the led driver but it won't turn on the backlight. When turn off the power strip through the surge protector I can hear the relays clicking off one at a time. (I did this before kevinm34232 posted the service manual in his thread: https://www.badcaps.net/forum/showth...ht=KDL-65W850A and realizing the 5 blinks error isn't because of bad LEDs)
The SM indicates the failure could be in:
- panel module most likely
- Tcon board most likely
- G* board (doesn't specify if G6, G7 or both) less likely
- B* board less likely
- H* board (IR) less likely
The troubleshooting in page 26 indicates to check PANEL_VCC 12.5V at CN8001 on the B* board. If I check while the 5 blinks error is displaying it reads 0VCD but while powering on it peaks to over 11 VCD and drops. If the LCD panel could be dead throwing harnesses and boards at it isn't a viable solution. Are there any tests to diagnose the real problem? Thank you.
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