Philips 42PUS7809/12 HDMI Fault

[meeko]

Hi,

My Philips 42PUS7809/12 displays a black screen on all HDMI inputs but only for certain sources. I've got an identical TV and this one works with the same source/cables so I know it's a fault.

Can I change the main board from the same model but different size screen (i.e. 55PUS7809/12)? I presume I will need to change some NVM settings to relfect the new screen size etc. Any help most appreciated!

Thanks,

Steve