Mesa Mark III not turning on.... Help!!

[jakedawgwhite88]

I was practicing this afternoon with the amp and stepped out of the room to do something and forgot to turn my rig off. I came back 5 hours or so later and realized I had left the amp in the on position but the little blue light was not on. The transformer was warm but the tubes were cold. I swapped out the power tubes and the tried the v2 and v5 tubes based on the amp manual suggestions and got nothing. Any suggestions? I'm not gigging with it regularly any more so I suppose I can be patient in getting it figured out but i'm pretty bummed and hope I don't have a larger problem.

 

[tony777]

Check the fuse first.

 

[jakedawgwhite88]

That was the first thing I did. It looked ok to me.

 

[loylo69]

Some broken fuses may still "look OK", so you must check it with a DMM.
Do you have a fan on your amp? If yes, is it running when the amp is turned on?

 

[jakedawgwhite88]

No the fan didn't turn on. I stopped by the local hardware store and luckily found a pack of the right fuses and a meter. The old fuse was deader than a doornail. Put a new fuse in and watched the little blue light illuminate and heard the fan! Thanks for the help guys! Ive had fuses go before at venues with questionable power but never at home and i've never seen one blow that wasn't completely obvious. Now I know haha! Thanks Again!

 

[loylo69]

You're welcome, glad you sorted this out. :wink:

 

[Markedman]

The fuse probably blew because your power tubes are getting old.