Hi all-
I have a few happy years on my Cornet 2, but it may need its first real maintenance. The LED isn't going from red to green. I've left it on for about an hour now, and the 5Y3 and the transformer are both still cool. I think replacing the tube might be a good first step, but I'd like to troubleshoot a little before buying one. Any advice on where to measure or what to look at?
Thanks!