GLD 80 Can’t Select Channel

Hey There!

We were given a loaner GLD 80 because our main board’s power failed. While it worked fine initially, suddenly I can no longer ‘Select’ a channel. Pressing the green button on a channel doesn’t work, and pressing the “PAFL” doesn’t light up the channel “Select” button. Any ideas what might have caused this?

Thanks for any help in advance!

All channels in all layers?
Do the channels still have control of the audio?
What happens if you clear the layers and then re assign channels to faders?