My Series4 has very low signal strength on both tuners. Started after a nearby lightening strike. Everything else works fine, I can get a picture if I amplify the signal a good bit, but even with the amp, the levels are still only in the 30~40 range.

I plan on buying a new Series4, and trying to repair the damage to the analog section with parts from the new unit. But perhaps it would be better if I could just replace the digital IC, that contains my lifetime sub information. I was thinking if remove the IC from the damaged Tivo, and transplant that into the new one I could retain my service number and subscription status.

Would that work?
What chip would that be?
Are there any other components that would be involved?
Would the old HDD work in the new unit, once I transplant the device?

Thanks for any adivice or tips on this situation.