CHEERSON CX 20 Test flight with new parameters

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This is a test flight of my CHEERSON CX 20 after the 4th flight a had a hard landing that never broke anything never put a scratch on it, but after that it would never arm and fly ? it would change what it was doing every time that i would try to plug in then finally down loaded flight planner and reinstalled the parameters i get no GPS or green light for GPS ? but appears to fly in manual mode ok with no GPS ? the first test after resetting the parameters it would still do Alt Hold, but now wont do that again? i reset it 3 more times to try to get that back but no luck, the motors will go up and down radical motions? any help would be great, the GPS light inside still blinks slow blue on the GPS unit but no connect and no green light on rear of craft? any thoughts please comment below thanks again for watching and please subscribe.