Hi Davy,
'Tesco' tellies have recently got even worse, as they seem not to use Vestel as China is cheaper, and may work 'till the guarantee expires.
On the up-side, just had a couple of 32 LG where the sound is rather good but the screen Leds die like flies. Not an issue with Vestel small screen sets, not yet had a duff one smaller than 32 inch using a Vestel panel and LG Leds.
Good luck changing the chip, should be a doddle as has pins - Chris.