Chosen Solution
Hi. after combing the diy sites, here is what I’ve come up with. I have Power board BN44-00912A AND MAIN BOARD BN94-12295K. When I unplug the main board from power board the Back lights WORK. There are 2 cables running from power board to main board. I replaced the mainboard but this didn’t fix anything (might be DOA but not sure) I have checked power on the power supply board but there is no pin that is clearly marked STANDBY to look for the 3.3 or 5v. There are 20 pins on CNM803. The first 5 are GND. The next few are VAMP (not sure what this stands for). Then they pin out like this: OD_LEVEL, FAIL_COUNT OD_ON/OFF BLU_ON_OFF POWER ON/OFF - (i checked this its at 4.5v) PINS 11-17 A13V PINS 18-20 GND
Hi @rgla The 7.5V standby voltage reference test point is marked on the board.
(click on image to enlarge) Here’s a link that may also help with troubleshooting the power board.
