Turn off computer before connecting VGA monitor?

By lopdog
Jul 20, 2008
  1. Should I turn off/hibernate my laptop before connecting a VGA external monitor, or can I just plug it in? Or would it be a good idea at least to suspend before I connect?
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    No, just plug it in.

    But if you want to be very safe (ie power issues on the data) Then turn off first
    Anyway, I've noticed some laptops require you to have the Monitor plugged in before starting, so it will turn on (without pressing any function keys)
  3. lopdog

    lopdog TS Maniac Topic Starter Posts: 295

    Thank´s for clearing that up. I just wanted to be sure before doing anything wrong.
  4. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    That's reasonable
    Actually the only ones that you cannot plug in whilst it's running is:
    The round PS2 connector (if you have one) for external Keyboard/Mouse

    Can't think of anymore
  5. lopdog

    lopdog TS Maniac Topic Starter Posts: 295

    I´ve heard that before. What´s the reason?
  6. jobeard

    jobeard TS Ambassador Posts: 9,351   +622

    KB/Mouse is a current sensing device; break/make a connection can destroy the
    hardware chip.

    Other devices sensitive to powered on conditions for cabling is Scsi devices.
    Unless the device is labeled for 'hot-plugging' like USB or Firewire, I try to do-the-safe-thing.

    I've always treaded video carefully after witnessing a monitor meltdown when plugging the VGA cable :(

    Of course, serial lines (rj11) or ethernet (rj45) can be hot-plugged.
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