Default [Q] acer tab A510 can't connect to pc after update JB

Hola , my acer tab A510 can't connect to pc after update JB before using ICS it working fine anyone can fix it, there Other problem my charger is broken so I charging using psvita adapter in off mode but it took several hours for 30 % battery anyone can suggest other Adapter because original charger so hard to find. Thanks for your help