I bought a used SBU first version at a pawn shop. Everything worked. I brought it home and went to put it on a charger. I did not notice the the charging port was a bit loose and I must have twisted it too far where one of the wires came loose and the charging port sparked and was engulfed into what looked like a fire from F15 fighter jet. It lasted for about 5 seconds. The charging port got fried and melted. I replaced the port, but it does not look like its charging. Can you recommend where I can take it for someone to repair it in Los Angeles?