Amplifier repair/mod/upgrade in Orange County California?

So my beloved Accustic Arts Power 1 integrated amp is acting strangely.  Sometimes I do not get any sound from it at all.  The only solution which only works some of the time is to shut it off.  I am hoping it is a simple fix (op amp maybe?).  While I am it, I was thinking I could get the repair person to upgrade some of the components like electrical plug, fuse, etc.  

Any input would be greatly appreciated.