Partially functional Plus/4

[Corsair24x2]

Allright guys, 15 years ago I bought a Plus/4 at a garage sale for five bucks, and i finally got on ebay and bought a power supply for it. So, I get it all hooked up using my c-128 setup.....

I get the purple-bordered screen with a white background and black text that I have never seen before! Commodore basic 3.5....60671 bytes free...

and three @ across the screen in a diaganol pattern.....everything else appears fine, so I press F1 to access the built in software...and then this:

(black screen, black border, yellow text, three @ still there)

break
pc sr ac xr yr sp
;1d43 32 08 00 00 rr

So, what could be happening? Any poke codes I can use to check the rest?

[Corsair24x2]

Upon disassembly, it looks like Capicitator on the bottom side of IC UT2 is damaged.

I pushed in some of the ICs, thinking after years they might have come loose from their sockets, and when I rebooted, one of the @ artifacts was gone. I attempted to load the built in software, but it failed again and then the @ artifact returned, this time blinking!

[channelmaniac]

Sounds like failed RAM...