I have a lifetimed model 140 Series 2 standalone which is dead. I think it's the drive. I was recently able to dumpster-dive a working (but not activated) model 240 Series 2 standalone (it looks externally almost exactly like my 140). Can I put the 240's disk into my 140 as-is and have it work? (I know I'll want to then tell the TiVo to delete everything and rerun guided setup.) Or are the OS partitions incompatible and I'll have to reimage the disk first just like I would if I bought a blank disk?