Hi, I received and assembled my new bike yesterday (ANCHEER Electric Bike, 48V 500W 27.5" Electric Mountain Bike with Removable 48V 10Ah Battery and 21 Speed Gears). The power assist worked intermittently for two minutes, then stopped working. So I tried throttle set to on, and that worked intermittently for a few minutes, and now it's not working either. No motor power is functioning, although the display panel and lights work, so electricity is being delivered from the battery. I opened up the cable works and jiggled things around, then I got a second of assist before it cut out again. Any ideas? I'll take it to my local shop if it's beyond my limited skills, but if there's something easy I could do, please advise me, because this is a very frustrating way to start out with a new bike! Thanks for any help!