Samsung TV power supply issue?

The TV is UN55NU7100FXZA with power supply L55E6N_NHS.

The TV turns on but I don’t see any backlight and of course no display. The remote assistant does come on but talks very fast.

I looked at the CNM801 connector from the PS to the main board.

Pins 3, 5, 7, 9 is labeled as 13V - but using a multimeter I read 26V on each.

What could the problem be?