Panasonic Viera TX-P46G10E 11 blink even after fan replacement

[Jacksoft]

Hi all,
I have here a Plasma TV TX-P46G10E that before had a problem where it had issues with 11 blinks (FAN SOS) BEFORE starting normally. After that it works for all day long.
It had some bad cold solder and I remade them all. After I replaced a fan that was half-dead (no RMP signal from the respective pin, but ok with 9V).
Now the TV power up instantly and works perfect... only without the backplate!
If the backplate is placed on the TV shutsdown after about 10min and start blinking with the 11 blinks. If I shutdown and re-powerup it starts blinking after a bunch of seconda. So I assume it's some sort of overheat protection.
Since I don't have a thermal camera (but I can ask a collegue for it) I checked the schematic/service manual, but nothing talks about overheat protection or thermal sensors.

I would ask you any suggestion where to check or which component to check.
Thank you.

[Jacksoft]

After days of headhache I found that original fans have a Thermometer inside instead of a Tachimeter!
So I made a little bypass by adding a 100k trimmer to drop the sensor voltage to about 1.20V.

The TV worked perfectly for hours with fans at maximum rate (9V)

[abertawe]

Thank you for postimg this.It is exactly describes my problem.however I will not fit a computer fan and mod but will hopefully be able to replace like with like.

[Jacksoft]

Yes it would be the best, but they're becoming rare and expensive
The only thing I could suggest is to see on the service manual, if any, if there's a specific code because I don't know if the thermal sensor changes between the fans.

[abertawe]

Thanks mate.