Sharp PC-1460 not booting

[DistantStar001]

I was recently given a Sharp PC-1460 Pocket Computer that isn't booting properly. When powered on it displays "busy" in small text on the top left of the screen and an * on the right. That's it. It doesn't respond to any keyboard inputs and reset has no effect. According to the manual, it should have a small line over the Calculator mode and a 0, but that's not happening.

I've replaced the main batteries (they were bulging but not leaking), and the RAM card battery tests good. I tried cleaning the contacts on the RAM card, but it had no effect. Any ideas?

 

[DistantStar001]

FIXED!!! Turns out that there were some dirty contacts under the rubber terminal contact for the RAM. After a good scrubbing with some IPA and a cotton swab, and completely re-seating every button because my hands shake (the HEX key is upside-down now, but I don't care) it's now working perfectly!

 

[WizardZeno]

Good job! I love working on old tech also. I have several Sharp pocket computers and accessories: 1 EL-5500II, 2 EL-5500III, 1 EL-5510, 3 CE-129P and a Realistic Micro 20 tape recorder for saving programs.