I'm trying to sell my old Roland 30X Cube but unfortunately all the amp models sound like a clean channel now.

Any advice? If there's a lot of hassle/cost involved to fix this issue then I probably would sell it for really cheap instead of trying to fix it (might actually save time and money this way...since it's a cheap amp)

Yes, there doesn't seem to be an option to reset (but the cube 40XL and the 80 do have such an option)
Frankly, apart from the obvious things like cleaning sockets I wouldn't even bother trying to fix a Cube. They are a disposable consumerable. If it had no volume at all then maybe I might check the power transistors but if the problem is inside the DSP section (like yours seems to be) I'd just drop it in a dumpster and move on.

Edit: Actually, I'd rat it for parts and then drop it into a dumpster. I never throw away transformers unless I know they are broken.
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
Last edited by Cathbard at Apr 21, 2014,