Garage sale Olympus OM-10 with issues

I picked up an OM-10 with 50mm kit lens at a garage sale, plus a Canon FD mount tele-converter, and a +10(?) diopter. Ten dollars... it is my birthday, I splurged!

Issues:
OM mirror does not quite make it back to the rest position, unless I actuate a lever within the base mechanism (with plate removed)
EDIT: it seems the shutter (and mirror) operation is electro-mechanical, so fresh batteries to follow?

Lens has some fungus

Any OM expert in the house?

EDIT 2: Looking around, I found two 357 batteries and the OM-10 works like a champ!

The camera has a nice feel to it
Lens may be a repair practice item, unless fungus does messes too much?

Good deal! I scored an OM 10 at an "antique" shop with a clean f1.8 and an ever ready case. The OM 10 didn't seem to work, but somewhere I remember reading about the whole thing being battery dependent. Total cost was $30, less the 15% off special of the day. Sure enough, with fresh cells it worked just fine. I now have a winder, the dedicated flash, a 28mm, a 135mm, plus an OM 4 which works well before it eats the cells. Such is life!

The longer fungus remains on a lens the greater the chance it will etch the glass and infect other lens stored with it.
UV light kills fungus so sit it in direct sunlight for a day or two then disassemble and clean it.

[QUOTE="jay moussy, post: 2235229, member: 89699"
Lens may be a repair practice item, unless fungus does messes too much?[/QUOTE]

If it is this lens, you're in luck...

Olympus OM-System F.Zuiko Auto-S 50mm f1.8 Lens Disassembly

Thanks tor the well wishers. Lens came back pretty nicely after a casual cleaning.

Kino said:

[QUOTE="jay moussy, post: 2235229, member: 89699"
Lens may be a repair practice item, unless fungus does messes too much?

Click to expand...

If it is this lens, you're in luck...

Olympus OM-System F.Zuiko Auto-S 50mm f1.8 Lens Disassembly
[/QUOTE]

Very close... minor differences between mine and the YT example:
Mine reads "ZUIKO' instead of "F-ZUIKO" additional MC, then "Japan" instead of serial number
Not sure what that means in Olympus-speak?