all caps look good I'll try by first replacing the 3 you suggested, Thanks! I will keep you posted on how I make out. You said you had an input/output jack board, would I be able to borrow your board to check if my problem is on that board. I get a hiss in the left channel after a while

I just re-read your reply It was on the main board? I have marked all of the 10uf caps in yellow the rest are 0.47uf

EDWARDEFFECT1 here are the pics sorry for the poor paint job. I assume the 3 caps are the ones with the red arrow on my close up photo?

Hartattack72 - I ordered the caps from digi-key under ($15 with shipping) 14 -10uf/16v, and 6 - 10uf/16v non polorized, If Edwardeffect1 gets back to me I'll have 19 parts  in stock-lol. If not, I'll decide on shotgunning and replace ALL 10uf caps on the jack board- parts are low cost & labor is free.... I will let you know how I make out with it!

Hello all,
my son was nice enough to sheer off the AMP MODELS pot for me. Is it a pot or rotary encoder?- I havent taken it apart yet- it still works if you reach in the hole and turn the shaft. Anybody here a line 6 dealer that would sell me parts I need the Pot and the corresponding knob. thanks, contact me at quazcha@yahoo.com

Hello all,
Greetings from the Peoples Democratic Republic of New Jersey.

  I too have the HISS GR-20 problem, EDWARDEFFECT1 could you list the capacitor's number ex: C7 or the location of the cap? I see (14) 10uf 16v electrolytics and (6) 10uf 16v non-polorized?
I may just "shotgun" and replace them all as I am SALIVATING at the possibility of having this fixed- I bought it new on ebay and had a problem out of the box-vendor sent me to Roland- they said vendor is not an authorized seller so NO WARRANTY REPAIR ON A BRAND NEW ITEM- of course I could send it to them for an $75 estimate charge...WTF?