Pen no longer works, definitely a hardware problem tried soft means

After air blowing from can it recovered two times but now no longer … it is a surface pro 3 pen but worked fine earlier … wi-fi and blue tooth also don’t work but usb dongle substitutes work fine … never mishandled machine … think debris entered it … any advice and tips would be greatly appreciated … am willing to take it apart …

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 0
crwdns2892346:0crwdne2892346:0