Mouse and keyboard lose connection

Hi all,

My Magic Mouse 2 and Magic Keyboard randomly (so it seems) lose connection and don't work anymore.

This is what happens:

• Mouse and keyboard always lose connection together, never just one of the two
• This sometimes happens during startup, often in the middle of a sessions and sometimes not at all
• Most of the time connection comes back after some minutes of waiting, sometimes when connecting something (not the mouse/keyboard itself) to USB and sometimes only a forced shutdown helps
• When I boot in Recovery Mode (which I have to do for another problem unfortunately) mouse and keyboard always seem disconnected; in Local Recovery connection comes back after some minutes; in Internet Recovery so far they stay disconnected

And this is what I did so far:

• Hold the devices close to the iMac, turn them off and on, move the mouse/press keys
• Remove all other Bluetooth devices from the Bluetooth list
• Run all three options in the hidden debug menu (reset the Bluetooth module, factory reset all devices and remove all devices)
• Uninstall Android File Transfer as I read in other posts this may help
• Disconnect all USB devices

None of these actions solved my problem. Any other ideas, apart from hardware repair?

Kind regards,

Jeroen