Samsung UN46EH6000F lightning strike

[dr.ido]

This is newer than the models I am most familiar with. EEPROM corruption could still be part of the problem you're having, but the failure mode is likely different.

It's unusual that the backlight is on as it is turned on by the signal board - usually by pulling the BL ON (or similar) line to +5V.

Something on the signal board pulling both BL ON and PS ON high while pulling the 3V rail down will probably end up leading back to the one big IC that does everything. I'd check any voltage regulators on the signal board, but beyond that it's probably only viable to replace the signal board.

In a way it's convenient that so many of these thin sets get cracked - there's usually used boards on eBay.

[rlovison]

The set has a manufacturing date of 2012.

I had incredible luck yesterday and won all three bids on eBay for each board for $.99 each plus shipping (grand total of $22). I figured what the heck, all three cost me less than I would pay for the main board alone. I'll let everyone know the results later in the week.

[rca2000]

Originally Posted by dr.ido

This is newer than the models I am most familiar with. EEPROM corruption could still be part of the problem you're having, but the failure mode is likely different.

It's unusual that the backlight is on as it is turned on by the signal board - usually by pulling the BL ON (or similar) line to +5V.

Something on the signal board pulling both BL ON and PS ON high while pulling the 3V rail down will probably end up leading back to the one big IC that does everything. I'd check any voltage regulators on the signal board, but beyond that it's probably only viable to replace the signal board.

In a way it's convenient that so many of these thin sets get cracked - there's usually used boards on eBay.

NOT always....

IIRC....some recent sam models had a "PS on Low"..meaning--that they had a 3v or so pulse on the PS line when they are OFF_-and lifting that line caused the PS to go to full on . So, a dead signal board WOULD allow for this failure mode.