The battery grip on my E-M1 the HLD7 stopped working correctly. The battery was not powering the camera and the controls were not working correctly.
I checked the contacts were clean etc they were OK
I charged the battery and the swapped it to the body it was OK
The shutter button did work.
The control wheels did not work.
I looked up the Oly cost for repair £53
I looked at
second hand one £50.
Then I was fiddling with it considering dismantling it to find the problem and I noticed two of the connector pins were were not prodruding tfrom the body of the grip.
I feared they were broken decided to take a look.
I took the top plate off and they popped up I put the top plate back on and now my grip works again.