Agilent E3632A Power Supply Parts/Repair

Agilent E3632A Power Supply Parts/Repair. Powers on.
Display bright. Fan slightly noisy (dirt?).
No rear rubber surround or screws.
Rotary encoder is intermittent (typical and repairable)
if spun quickly it will adjust.
Output checked OK w/ load resistor.
Offering “As is, final sale”