So my Series 3 TCD652160 is one of the "rare" ones with blinking green LED that Weaknees couldn't fix at the motherboard level. Murphy's Law strikes me again. They offered me the option of one of their Premiere models: TiVo DVRs with All-in Lifetime Service (No Service Fees)! I have a spare, never-used, TCD652160. Is TiVo still allowing lifetime registration of these older models or do I have to go with the newer models for lifetime? Is the TSN stored in a flash chip on the motherboard and can it be moved from the old board to the new one? If not, which of the Premiere models in their link above would be most similar to the TCD652160? This is my parents' unit and they only need the functionality that the Series 3 offered. Many thanks in advance.