Nexstar+ Handset buttons unresponsive.

[Cosmic Geoff]

I have a Nexstar+ handset, now several years old, used with a SLT mount.  It was OK to begin with it, but the buttons have become less and less responsive in the top row, so that I have to mash the Align, Enter or Back buttons repeatedly to get any response, and it is becoming worse.  A couple of years ago I dismantled the handset and tried cleaning the button tracks, but it did not make much if any difference.

I have searched online and not found a similar case, much less any fix.

Last time I used the handset it was so bad on the Align button that I almost gave up. Now I am wondering what to do next - buy a new Nexstar+ handset, upgrade the whole mount to something else, or use the spare (older version) Nexstar handset I'm not using, that came with the C8 SE?

[newbie alert]

Is your older handset a nexstar* ? Not too sure if it's compatible with the board... best sticking to nexstar+ as it can be used with CFM rather than the older HCupdate 

[Cosmic Geoff]

The older handset is the Nexstar*.  I found that all three variants (Nexstar*, Nexstar+ and Starsense) workd with the C8 SE.