No display on Phillips 43put6002/56

Hi, my led tv Phillips 43put6002/56 is booting, power supply is good, sound ok, backlight ok, I replaced tv with a new t con board but had no menu and no picture. I checked all voltage on screen panel and capacitors all is ok. Check also mainboard voltages all seem ok. Is mainboard faulty like a corrupt ic code? Or something else. Thx