Backlight error bypass on a KDL-40W605B

As my 11 year old KD40W605B has developed a 6 x flashing red light error, I have researched it and noticed there is a temp fix where you can cut the BL_ERR wire on the cable that runs from the LD

board to the main board, and then ground that wire.

I am stuck in identifying which is pin 28, would anyone please be able to assist? See the photos attached.

Note:

The TV is 11 years old, hence something else may fail and result it a replacement TV, which I can live with.

The TV is fully up to date with the latest software, after a factory reset to see if that solved the problem of the flashing 6 reds

I have gone into the service mode on the TV and there is no backlight error message stored, so the issue could be more sinister, hence thinking of trying to ground the BL_ERR wire first.

Many thanks