Hey guys, ive only had my phantom for a couple weeks now and only flew it 3 times with no problem. The last time i flew it i had mounted prop guards and flew it but when i landed i chipped/broke some propellers. Today i was going outside excited to do some air photography at my local park but when i started and connected everything up only 1 propeller was working the other were jamming. I came home disappointed trying to find how to fix my problem. Last time i flew it even as the propellers chipped all 4 propellers were still working properly.( spinning fully without jamming) I found a similar person who had a problem and i read it possibly had to do with the prop guards and the longer/shorter screws. I ended up changing the screws back to factory. When i did that one of the propellers that wasnt working started working, so i had 2 front propellers working but the 2 in the back were still jamming. i tried messing around with the screws but with no luck to get them to work. I also did a compass calibration but that did not work. Any help is appreciated. Thank You.