Thanks gonk for your response. It used to work fine with the trigger cable out using the front power switch, now it won't come on at all using the front power switch, with or without the trigger cable plugged in.The rear panel fuse seems to be good and the main switch on the rear panel is on. I pulled off the cover and all the fuses inside are okay as well.

The trigger cable has always been touchy, a little too far in or out and it won't work, I had to get it seated just right for it to work.