A relatively new BV8000pro.
Have changed the USB charging board to restore loudspeaker functioning but the volume is low.
I have also ordered a speaker but surely that couldn't be faulty as well?
I wanted to get into engineering mode to play but *#9646633# doesn't work.
Anyone know?

Edit: I have an old BV8000pro with Android 7.0. EngineerMode Version 1.0 is available and listed in Settings>Apps>Show System>All Apps
         The newish BV8000pro has Android 8.0.0. EngineerMode is not listed in Apps

MichaelT wrote:

A relatively new BV8000pro.
Have changed the USB charging board to restore loudspeaker functioning but the volume is low.
I have also ordered a speaker but surely that couldn't be faulty as well?
I wanted to get into engineering mode to play but *#9646633# doesn't work.
Anyone know?

Edit: I have an old BV8000pro with Android 7.0. EngineerMode Version 1.0 is available and listed in Settings>Apps>Show System>All Apps
         The newish BV8000pro has Android 8.0.0. EngineerMode is not listed in Apps

Go to the dial interface and dial "*#87#"  into engineering.