Ok so we have are tivo for 5 years and it is with the lifetime service. Last week the screen went grey and was trying to restart . then it went black and there was no lights on the front of it. I orderd a new hard drive and power chip for it off weaknees and after i put them in there was still no joy

We also have comcast cable ane i had heard that if you didnt have a HD tivo that when they change to HD my tivo wont work .
How can i get my tivo working again and not have to pay 300 for a new one and 300 for a new lifetime service and not have my wife hang herself because her crap MTV shows cant be seen
Also should i send the parts i got off weaknees back to them ( i would like to keep the hard drive cause it was an up grade from 40g to 160g. Please help