Realistic HTX-100 button beep removal?

[Stapler]

I recently required a dead and butchered HTX-100, After fully recapping, a lot of trace repair, new TDA1905 amp, Used but good MRF477 it’s now working fine, But does anyone know how I can remove the button press beeping as it’s really annoying, Any help appreciated, Thanks

 

[sp5it]

Remove R413 from CPU board or disconnect cable marked red.
Mike

 

[Stapler]

Remove R413 from CPU board or disconnect cable marked red.
Mike

Excellent thanks, I simply cut the blue wire, All I need to do now is figure out why the hi Lo power switch isn’t working (switch is fine) or I may just add LSB too it instead

Thanks again for your quick response