Geeetech

I've setup an old laptop, same O/S etc, bunged on the repetier software I use, got Cura on as well, all seems to work ok, so obviously an issue with my main pc, not tried printing as yet but nothing to say it won't print. Got to make sure all ok, bed level blah blah blah

Hi all, I've had a geeetech printer standing idle for a few years, went to power it up the other day and I had 2 lines of blocks on the LCD screen flash up, vanish for 10 seconds or so, flash up again and so on. If I unplug the usb lead to my pc, this doesn't happen, only when I'm hooked up to my pc...