A recurring issue with my Black Rose.
U20 keeps blowing. It'll work fine for anything from a day to a week then blow causing a column of the switch matrix to play up. So if you hit "top standup bottom" every switch in row 1 will activate. That happens with every switch in that column activating their respective rows.
Its always column 4 with the jets on it and a month ago I had removed them to adjust their leaf switches.
So i assumed it must be a short in that area? Would that blow it?
But i can't spot anything at in that area and it doesn't explain why it can work ok for up to a week, so surely it's not constantly shorting?
Your expertise is really appreciated. I have 9 u20 chips left...