My Remote on my preamp has stopped working

Have you pulled the batteries and cleaned up the area where they make contact to form the circuit? Enjoy the music

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.