[Test-Equipment] Tektronix 475A o-scope shut down failure (inside power?)

[John Hensley]

Aaarrghhh!  Turned on my 475A today for the first time in probably a month onlyto have it die in front of me.  The power line fuse (1.5A 3AG) is good.  I hear a transformer hum but the display and all lights just went out.  
This is the first time I will be diving into this unit.  If you have experience with a475A repair and don't mind sharing, please get in touch via private email.
w5jv at hotmail.com
John