After several moves and many years without using it, I decided some months ago I would put again my venerable Apple ][ (I got it in December 1979) back on my desk. At first I've had difficulties to start it, it didn't even beep, until I changed the original PSU for a new one sold by ReactiveMicro (I had checked the original PSU output voltages and noticed they were too weak). After removing the dirt, cleaning the keyboard, pressing the chips firmly into their sockets, it finally booted, and I was quite surprised to see how good the original floppies are still after more than 3 decades in the attic (I've even successfully booted an Apple original 13 sectors DOS 3.2 disk dated 1979!).
Although it runs correctly most of the time, it is still very unstable, and (quite often) randomly fails into the monitor, or refuses to boot, or displays bad characters or error messages. Generally, I switch off the power, open the lid, gently press some chips (some are not firmly held into their socket), power on, and voilà it works properly again.
Some chips have rust on their pins, that can be an issue, but I clearly remember having already experienced the same instability with that same machine back in the 80s, when there was no rust (this is one reason I stopped using it, the other being I had changed for a IIgs).
Is it possible to fix the socket issue, and have a usable and working Apple II/II+?
Thanks for your feedback!