Please Help: Two Playstation consoles not booting after attempted save (Mod problem). Details inside.

Thanks for helping --

Here's the deal.

I have been modding for years, and successfully modded two Playstation SCPH 7501 systems (old school, I know) with an elite 7 wire mod obtained from modchip.ca

Everything went smoothly, games were booting fine, until I decided to attempt to save my state. I dont know if it was because I had a (not only used) but "generic" memory card, but when I attempted to save my state the game froze. No biggy, powered off. Turned things back on and get the menu that says "Memory Card / CD Player" options. At first, since it was on one of the systems that were older, I felt it might be the hardware or a poor mod installation on my part - so I tested the idea on the second system by attempting another save.

Same thing. Now both systems give the same error. I have since looked at my soldering job, checked all wiring and even replaced the laser reader in one of the machines. No luck.

My last attempt will be to remove the entire chip and attempt to boot off an original, and see if that works. I actually have NO original playstation games because they're all scratched or cracked... Until some more money comes my way I won't be testing any.

Before I go through all of that, is there any modders or guys that might have some input on my situation? I mean, the install is fantastic, and I know my problem is related to the memory card. What should I do!?

Again its a 7 wire elite mod, on two SCPH 7501 models. What's going wrong here!? I've done much harder installs on PS2s and Xbox machines with success.

Thanks everyone, my wife and I would love to start playing the ps1 again...