The trigger cable problem sounds like a connector that's not quite the right length - it's overshooting the "sweet spot" and losing contact for part of the connector. I've run into that with some headphones before (lose one channel). I'd say that the cable was at fault, but if it's not even working with the trigger cable removed I don't think that's the case here. Outlaw will get you back on track next week, but in the meanwhile all I can think of is to either try a new trigger cable (just in case) or remove the trigger cable from the equation and try unplugging the amp for a while then plugging it back in - and both are definite long shots.