Samsung HL-S5086W 50" HDTV "bush tv won turn" Questions

...won`t turn on but has a high pitch noise coming from back of set. The high pitch noise is the color wheel that needs replace the noise is coming from a bad bushing that goes to the color wheel and is ...

...bush tv with freeview built in and yesterday i had channels 3,4,5 and itv2. But today i haven't got them. i have tried to retune it about 3 times and i still haven't got them can anyone help once you ...