Chosen Solution

Hello. I was disassembling my Vita 3G to change to main board but i got a problem. On the Guide it said to unscrew the wifi card to remove it ( and after remove main board etc … ) but there isn’t any screw ! To be precise, there is some kind of screw, but it’s flat, no cross or anything to grip a screwdriver head on it ! And i can’t remove the main board, there is a screw under the wifi card to finally remove it ! There is a way to remove it without damaging anything ?

i got kinda the same problem, i want to remove the mainboard but i cant remove those 2 screws of the wireless card .