Power went off briefly

Discussion in 'TiVo Coffee House - TiVo Discussion' started by HarleyRandom, Oct 30, 2020.

  1. HarleyRandom

    HarleyRandom Well-Known Member

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    Here's a weird situation. My lights flickered and then the TV went off. The lights may have gone off too but I don't remember. I have an antenna which currently doesn't work because it's not in a place where it receives signals, but it has a feature that allows the direction to be selected based on what channel it is receiving, so it adjusts whenever it comes back from a power outage. My Roamio, however, did not reboot, even though it is plugged into the same surge protector (or maybe it just looks like one, but six devices can be plugged into it) as the TV. The antenna is plugged into a different one, I didn't notice whether the Bolt rebooted, but it is plugged into the same surge protector as the antenna (yes, I think it is one). I checked on the Series 3 (in a different room) and the cartoon character appeared on the screen, indicating that it restarted. The show I was recording on the Roamio was never interrupted and I was able to resume watching what I had been watching once I had checked on everything else.
     
  2. cwerdna

    cwerdna Proud Tivolutionary

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    The capacitors in the power supply may have kept the unit going long enough to survive the power blip.

    If you don't want interrupted recordings or whatever, put your equipment on UPSes. They'll stay running until their batteries die.
     
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  3. jlb

    jlb Go Pats!

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    UPSes also cover you from likely more damaging brownouts where power drops lower but doesn't go out totally. That's super hard on hard drives.
     
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  4. CommunityMember

    CommunityMember Active Member

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    Depends on the UPS. Some will not trigger until the power is effectively off, some have buck/boost support, and some do have high/low settings for switchover. It should be noted that only the more expensive UPSs tend to have sine-wave output, and square-wave output can sometimes generate different artifacts (but is usually better than no power).

    In any case, with most switching power supplies in current gen products (only cheaper devices are still using classic linear supplies) the voltages are typically kept in line even with high variance in the supply voltages (that is why one sees a single power supple in most devices officially capable of working from 100-240v, but unofficially they can typically handle a somewhat larger variance).
     
  5. jlb

    jlb Go Pats!

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    Well ok then. All I know is I had a basic APC UPS that saved my older TiVo once that also killed some equipment not on the UPS
     

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