How do I format an HP-48GX FRAM Card?

[orodionov]

Hey Guys. I did design and sell those FRAM cards back in 2016. It is remarkable for me to see it is still in use. It was PITA to design and assemble them. Design was tricky because FRAM required level shifting. Level shifting chips, on the bottom of the card, had to be controlled in a way that fits the timing and protocol of the HP48 Assembly was complicated because chips have very fine pitch and my assemby technique to flow the solder included the electrical pan)))))
Most likely, the issue is cold joint in one of the pins. Solution could be to re-flow the card or touch every pin with the solder gun