So recently I purchased an Apple II Plus, it tested out okay without it's floppy. I could turn it on, get to a command prompt, type in some commands, write some basic, and run it. All was well. I finally decided to hook up the drive, I have an Apple Disk II 5 1/4 floppy, the one with the black face and bezel. I grabbed the first available bootable disk I had, an dold Applied Engineering AW 2 Expander Disk. I went to boot the machine, got the beep, the driver chugged and whirled, and in a few seconds I had a menu. This is where things start to go awry.
I notice that there's quite a bit of flickering in the menu list on the screen. I go to choose a selection and I get nothing. I hit ctrl-reset, and pull the disk. I get to a command prompt after reboot, type in a letter (any letter) and I get 6-7 lines of that letter that appear instantly, and then the last row the letter repeats out like I'm holding down a repeat key. Then it "returns" automatically, I get a backslash character, a carriage return, and then a new line that starts with an asterix below the old one (plus repeated letters), and it does the same thing. It's caught in an endless loop. If I hit another letter it simply starts again with that letter from that point, and then continues into the new line. So I get a paragraph full of the letter "H", then a rapidly repeating "H", until it reaches it's "end" then it starts over. Also in a short video I made I noticed that at the top immediately after reboot, I can see what looks like something from the assembler, the row across the top has these entries.
"00A9- A=FD X=00 Y=FF F=B5 B=F2"
But other times after powering off and back on, I get a standard prompt instead of the asterix, I still get the backslash though and return.
Here's what I've done. I removed everything. All expansion cards, keyboard. I've pulled the encoder ROM on the MLB. At least I think it's the keyboard encoder ROM. It actually has a Videx sticker on it. It has imprinted on it "LOWER CASE (c) 1981 VIDEX". I assumed it was the encoder, I tried pulling and reseating it, but no love. So at present I have an Apple II Plus, sitting here with no case, no Int card, no drive card, speaker unplugged with only power and video plugged in. That seems to be caught in some kind of text repeating loop.
Any ideas would be very much appreciated