Don't play it until it's fixed! I watched a friend's V-9 go up in smoke onstage 15 minutes into their set- turns out the fan never kicked in, and a cascading tube and component failure was the result. he had it rebuilt but it never sounded the same.
It would be unusual for the fan to fail by just stopping without any noise. Chances are you have a bad connection. Re-seating the fan connector(s) in the amp might fix it.
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Official Ampeg Portaflex Club #89
Last edited by beans-on-toast : 12-04-2010 at 06:00 AM.