My Remote on my preamp has stopped working

My Remote on my preamp has stopped working I now need to turn it on using power switch  Any help

Ah first-world problems.  

You are using that preamp to control the system you have pictured in your profile? This must be a different system.

Batteries first, replace remote next…

You can point the remote at the camera on your phone and should see something flashing white light.  This will be a good indicator of whether the remote is working.

if not, new batteries and cleaning of contacts.

Good luck.

Good excuse to get a new pre! 😁