Sound going up and down and switching on and off is caused by dirty USBC contacts. Clean with a non conductive item like a wooden tooth pick and spray with wd40 or contact cleaner. And it fixed a load of other problems. The contacts were going green on my BV9600. Looks like it causes a low voltage s...

Sound going up and down and switching on and off is caused by dirty USBC contacts. Clean with a non conductive item like a wooden tooth pick and spray with wd40 or contact cleaner. And it fixed a load of other problems. The contacts were going green on my BV9600. Looks like it causes a low voltage s...

Ok I've just replaced the charging board in a BV9000 pro. It's not as straight forward as it looks. Unclip the gps plug then unsolder the speaker. then unsolder the mic then unclip the ribbon connector and then undo the only screw. sounds easy ???. Nah. Then the reverse with the new board sounds eas...