Apple II

My europlus seems to have problem. On power up it will not start basic (applesoft) and will instead just quit to the monitor with the following message :

E008- A=03 X=38 Y=1B p=35 S=BD

This problem has gotten progressively worse. It happens with and without the keyboard attached. I've tried reseating chips but nothing seems to have made a difference.

Basically it types a paragraph of random (but uniform) letters then seems to hit return all by itself.

All the time it's doing this, it's beeping an awful lot, like an Apple possessed!

I can interrupt the mayhem intermittently with keypresses, but it continues to repeat the letter e.g. QQQQQQQQQQQQQQWWWWWWWWWWWWWWWWWWWEEEEEEEEEERRRRRRRRRRRR... etc

I have a II+ with paint in several that looks like it's about to chip away. There are also some other areas where the previous owner drilled holes into it and it's generally in a sorry state.

So I'm thinking of stripping, filling the holes and repainting it.

Would that require any type of special paint to keep the textured surface, or is that how the plastic is already moulded underneath?

Also, what's the best way to remove the existing paint?

I was wrong when I connected my disk II to the controller board

row 2-4-6...20 was connected on row 1-3-5...19

any idea of way may have burn ?

the 74LS125 is dead, exploded, I changed it

then engine is turning, and I hear a bump, so I guess the stepper is working

connection realized with my error
gnd 1 2 stepper 0 ok
gnd 3 4 stepper 1 ok
gnd 5 6 stepper 2 ok
gnd 7 8 stepper 3 ok
-12 9 10 wrreq burnt ?
+5 11 12 +5 ok
+12 13 14 drven burnt ?
+12 15 16 rddata burnt ?
+12 17 18 wrdata burnt ?
+12 19 20 wrprot burnt ?

any idea of the conponent that burnt in this case ?

thanks