With the current TiVo firmware. A single M-Card will work in a Series3 and enable control both tuners. ..until you reboot the system, then the unit will only see the card as one tuner. Seems like a problem that could be fixed with firmware.
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With the current TiVo firmware. A single M-Card will work in a Series3 and enable control both tuners. ..until you reboot the system, then the unit will only see the card as one tuner. Seems like a problem that could be fixed with firmware.