Happy Holiday's all.
When my TiVo reboots (Firmware, etc) it gets extremely loud. The fan sounds like it is racing so fast. This usually lasts a few minutes then it quiets down. I have no problems with the unit at all.
One rep says this is normal, and another said it is not normal. I have the extended warranty on this and they wanted to do an exchange for a refurbished unit which would then knock my warranty down to just a 90 days on the refurbished.