I have just become the owner of an Apple II+ out of Holland. Its in good physical condition except for what looks like a home built language card that is severely corroded. The language card was preventing even the motherboard from even powering up so I pulled it out. Then I got the power light but no beep. The video showed a screeen of mostly @ symbols and constantly rolled. Here is a snap:
Is this possibly due to a corrupt chargen?
Here is what that chip looks like (at least I think its the chargen). The EEPROM 's gold foil sticker has partially detached itself over the years. Could that have meant corruption from ambient light?
I lifted the SN74LS174N it is bodged into and the display displays "blocks" that look somewhat less corrupt. However, still now beep. BTW, the results are the same regardless of whether the keyboard is plugged in or not.
I appreciate any thoughts :-)