lg 28cz10rx dark patch on screen

[zoodemon]

Hi i have a LG 28" widescreen TV which is about 2.5 years old. It has already failed once outside warranty and it cost approx £120 to have a circuit replaced. Now the screen has started to darken in one corner so i figure another fault is looming. Whilst looking for help with the original problem i found out that this is a beko tv that is just badged by LG. I won't be buying LG again.
Anyone had any similar problems and any ideas on faults or useful forums for help.
thanks