So I just had a gig on Friday and unloaded my truck today to test out my new guitar. So I pulled out my HRD 4x10 and went to plug in and, lo and behold, my drive channels don't work. Neither of them. Clean channel's just fine. Can anyone give me something resembling a plausible answer?

Help, UG. Please!
Pull out the preamp tubes and plug them back in.
Gilchrist custom
Yamaha SBG500
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100

Cathbard Amplification
My band
Most likely a preamp tube, but could also be a problem with the switching circuit.
Bruce Clement
BC Audio Hand Crafted Performance
TS;DR Ask it nicely.

Sorry,I really wanted to do that ^

It's probably a preamp tube as mentioned above. Loose maybe?
Quote by FEngHLyan

She will join the prom.

She insists to wear this lights.

I don't think so.

How can I persuade her?