[wrxtasy]

Just bought a Nvidia Shield. Problem is that that the colors seem washed out. My TV is Sony 65xf9005.

Is it just to return it or is there something to try before returning it?

I tried different modes, tried with enhanced hdmi and none on my TV settings.

So confirming you have the SDR (Rec.709) color conversion > TV display issue when the Shield is set to 4K 59.940Hz YUV420 10-bit Rec.2020
As displayed in the top picture in @hdmkv's post HERE ?

NVIDIA need to implement colorspace switching, and that needs to be done at the Linux Kernel / driver level, independant of Google's OS.
Like all the other Android chipset vendors have already done.

I will be very surprised if that ends up being a quick fix. A whole bunch of testing needs to be done as well.