I did this procedure once with a graphics card (Radeon HD 7870 GHz Edition), which had the strange error of supporting only EFI/BIOS resolution, even the boot screens of Windows/Linux crashed the GPU.

It works until now without any problems (~6 months of heavy Corona-caused gaming usage).

I do not have a clear procedure for doing that, but it takes roughly these steps:

• Prepare the PCB: remove all components which are mounted after the original solder procedure.
• If the PCB has SMD parts on the bottom side, use spacers: every part should not touch any surroundings! In case of the graphics card, I used Makerbeam profiles with M3 screws. The TV's PCB has nothing on the bottom side, so I just placed it on the grate.
• I am not sure if it is helpful: maybe cover regions with aluminium foil. These regions might be parts you know the are working correctly or plastic parts you cannot remove
• Put the PCB into the oven (I put it in the cold oven)
• Preheat to 150°C.
• Wait for the oven to reach the temperature, and wait for a few extra minutes (2-3min)
• Heat up to 175°C, wait another 2-3mins 
• Heat up to 200°C and wait 2-3mins
• DO NOT MOVE THE PCB at this point, parts may be loose.
• Switch off the oven & open the door
• Please ventilate the room, I don't think its healthy...
• Wait for the oven to cool down
• If you can touch the PCB, try if this reworking succeeded!

I had to do it twice for my TV's board, because on the first try, the remains of the antenna connectors were too high, so the plastic cover pressed down the PCB again.