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USB turns off sometimes when kitchen light is turned off

Discussion in 'General Hardware' started by OzzyOscy, May 4, 2020.

  1. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    On occasion, not all the time, whenever the kitchen light downstairs is turned off, the USB on my PC upstairs turns off for a split-second before reconnecting.

    I'm not sure it does it for my keyboard and mouse connected in the back, but (when it does happen) it'll occur on my gamepad or possibly USB drive connected to the front USBs.
     
  2. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    So this is normal then?
     
  3. Jamin280672

    Wise Guy

    Joined: Feb 12, 2014

    Posts: 1,903

    Location: Halesowen West Mids

    LOL, thats brilliant :D and no its not normal, I suggest you get an electrician in to check your wiring.
     
  4. benjii

    Mobster

    Joined: Apr 26, 2013

    Posts: 3,520

    Location: Plymouth

    Cables can act like antenna and therefore are prone to disruption if a strong enough electrical field hits them. At the very least you should phone an electrician and see what they think, as it may need addressing.
     
  5. m_c

    Associate

    Joined: May 10, 2020

    Posts: 15

    LED lights in the kitchen by any chance?

    We have some cheap LEDs at work, that when you switch one room off, it'll briefly knock the LEDs out in the next room. I'm assuming they've got rubbish filtering, and create a spike when switched off.

    I'd get one of the basic plug in socket testers with the row of LEDs on the front that tell you if a socket is wired correctly, and check all your sockets have good earths.
    If all that is good, there's not much you can do, short of fitting better quality lights in the kitchen.
     
  6. Havana_UK

    Mobster

    Joined: Oct 14, 2004

    Posts: 4,739

    Location: location, location

    I bet you have cheapo LED lights in the kitchen and they don't actually meet EMC/EMI requirements, even though they will claim to do so.

    If they're retrofit lamps then change them for something from Philips, Osram or similar. Whilst they're all made in China for peanuts at least the big names take their obligations to produce market-legal products seriously!
     
  7. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    An electrician has been round for the 5-year check once or twice if that counts.

    If an LED light is the one that's a strip that takes a second or two of flickering before turning on, and bugs fly in it and can't get out and die, then that describes my kitchen light.

    It's been happening for years but sporadically. When I wrote this thread it seemed to be happening once or twice a night for a few days, now it hasn't happened since, then it might happen again in a few days, weeks, months...
     
  8. m_c

    Associate

    Joined: May 10, 2020

    Posts: 15

    Sounds more like a fluorescent lamp, as although LED lamps can take a couple seconds to turn on, they generally don't flicker into life.

    However fluorescent lamps can cause interference issues as well, in fact, they're probably more likely to cause issues, as they use higher voltages than LEDs. Only thing you could try is either fit a new lamp, or convert it to a decent LED. Converting is easy if it's a ye olde fitting with a separate starter, as you just swap the starter for a dummy, but if it's an electronic ballast, you have to rewire and bypass the ballast.
     
  9. Brizzles

    Soldato

    Joined: Mar 16, 2005

    Posts: 7,194

    Location: Clevedon , Bristol

    Yep, you are not going mad i get similar.

    When the strip light ( long fluorescent bulb ) for the kitchen is switched on, i get a split second sound drop via USB
     
  10. DJai

    Gangster

    Joined: Apr 5, 2020

    Posts: 271

    That would drive me crazy, you say you have an electrician come around every so often. Have you mentioned this problem and been able to show it?
     
  11. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    Yeah that's the word, fluroescent, haha I couldn't remember what it was.

    No I said the electrician had been round for the 5-year check once or twice. Also it wasn't mentioned as I forgot all about it at the time(s). That tells you how long it's been since it started and how sporadic for it not to be a real problem!
     
  12. m_c

    Associate

    Joined: May 10, 2020

    Posts: 15

    I'd say your typical electrician wouldn't even know what to check for. The issue is likely to be either a poor or failing filter, which unless it's totally failed and causing a problem, your typical electrician will think everything is fine.

    A 5 year check is just a basic safety check. IIRC all they check are the earths are good, run insulation tests, and test RCDs. A bad earth could cause the problem, but it's only one possibility.
     
  13. DJai

    Gangster

    Joined: Apr 5, 2020

    Posts: 271

    Still, it was annoying enough to post about it. Looks like others have some good suggestions.
     
  14. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    Feel better?
     
  15. DJai

    Gangster

    Joined: Apr 5, 2020

    Posts: 271

    You misunderstand me, I'm not annoyed. I'm saying that you felt the problem warranted posting a message, meaning it must have been annoying you.
     
  16. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    Or I was curious!
     
  17. DJai

    Gangster

    Joined: Apr 5, 2020

    Posts: 271

    Either way, you've had a good response.
     
  18. OzzyOscy

    Associate

    Joined: Apr 21, 2020

    Posts: 44

    Erm... thanks?