TIVO3: No picture on channel 10,14,15,16 on one of the tuner

[RichardReed]

I just purchased Tivo3 last week from store.TC and couple days later I notice that one tuner will not get any picture on channel 10, 14, 15, and 16 (cable only - OTA in these range are OK). However, when i switch to different tuner to these channels it work flawlessly. I am using HDMI and no cable cards (CC wont come until this Tuesday evening).

My question is that is anyone having this same issue? Is the tuner defected? I want to try to get some answers/solution before I contact store.TC for exchange.

Thanks,
Richard