"Low wifi signal, also drops off"에 답변Their could be multiple issues with it. u could have damaged the WIFI/Bluetooth Antena or its not seated properly! does it greys out on u?
"My built in display is black but external monitor working perfectly?"에 답변have u checked to see if u damaged the LCD Flex. (ripped, pinched, etc) If not use the alcohol to clean the male end connector and female end on the logic board. Sometimes that would do the trick.