[Elecraft] K3 DVR comes and goes?

[Jeff Kinzli N6GQ]

Hey y'all, I have an old K3 that we upgraded to K3S a few years back. It
also has a DVR unit in it. All firmware is current.

Today upon powerup the DVR didn't work - showed as not installed and
obviously didn't work.

I powered off the radio and back on again, and there was the DVR, working
again as usual.

I'm thinking the contacts may need cleaning on the DVR/pins - but also
wondering if there's other things that I should check. I'm taking the radio
on a dxpedition soon and want everything to work properly.

Thanks,

Jeff N6GQ