I have a Crate V100h that had the same symptom, panel light was on but not much output from the SMPS. It took me awhile to figure out with my 1970s electronics training. I was about to retrofit it to a traditional power transformer but ones with a 15V+ and – outputs are very expensive. After learning how a switch mode works, on mine, I located and replaced a shorted rectifier diode in one of the 15V outputs and the amp came back to life. If there is a fault in one of the outputs, the logic chip pretty much shuts the power supply down. I’m still working on a tweek to fix the crappy tone these have in their high gain channel. Maybe changing a capicator value in the right location. If anyone ever reads this and has a solution, I’d love to hear it.

Please god help me. I recently paid $240 for an unused crate dx112w. It’s played absolutely brilliantly for the past week until last week when, whilst swithing it on it just turned itself off again. Now i don’t get any power or even any light in the "digital" sign. Absolutely nothing. I’m totally distraught because obviously now the amp has passed from the original owners hands the warranty is void. Please help me…

: I’m don’t know anything about the GX-80 but if it’s a Solid State amp then it sounds like the pre-amp is bad or a connection problem before the pre-amp. Any electronics shop (TV,Radio, VCR, etc..) should be able to repair it for you. : : The question: : : I have a Crate GX-80 amp. Two inputs. The inputs have stopped working. I have plugged into both inputs–no sound from either. : : The speaker is working; in fact, when I jack into the "line in" input, I get full sound (but you cant control volume, tone, effects from line in). The guitar cable and jack on guitar are fine. : : Any ideas on how to repair this? No amp repair people in the DC area, so I have to figure it out myself or send the damn thing (not under warranty) back to Crate. : : Thanks.

Hi Alan, I had a problem on a Crate GX212+ that could relate to yours. My problem was "channel hopping" – the amp would switch randomly from the dirty to the clean channel in the middle of a song! I tracked it down to the footswitch jack. The bypass contacts (jack not inserted) were dirty. Your problem could be the effects insert jack (if you have one). Try switch cleaner (squirt some in and push a jack plug in and out several times) or either replacing the faulty jack or (better if you don’t use it) hard wire across it. Crate will supply a schematic if you need one. Good luck! Paul : I’m don’t know anything about the GX-80 but if it’s a Solid State amp then it sounds like the pre-amp is bad or a connection problem before the pre-amp. Any electronics shop (TV,Radio, VCR, etc..) should be able to repair it for you. : : The question: : : I have a Crate GX-80 amp. Two inputs. The inputs have stopped working. I have plugged into both inputs–no sound from either. : : The speaker is working; in fact, when I jack into the "line in" input, I get full sound (but you cant control volume, tone, effects from line in). The guitar cable and jack on guitar are fine. : : Any ideas on how to repair this? No amp repair people in the DC area, so I have to figure it out myself or send the damn thing (not under warranty) back to Crate. : : Thanks.