Good afternoon, I hope you're all doing very well today. I'm a long-term lurker here at TDPRI, & I value your thoughts & opinions. So I pulled V1 preamp tube (channel 1's preamp) in my twin as I've done many times before (i only use the vibrato channel), plugged my guitar back in & turned 'er on, now my beloved amp refuses to power up. I immediately turned the power off, plugged the tube back in & then turned the power back on, but she's not even trying to fire up. Any ideas as to what might be going on? Thanks in advance for any & all ideas/help!