Technical problem-disassembled instrument to clean keyboard-disconnected ribbon cables, carefully put everything back-now ramdisk (512K) is locked up. Everything else works perfectly, and ramdisk had worked perfectly for the three years I've owned it. Is there a way to initialize the ramdisk? I know how to bypass, holding down enter and powering up, but trying to access the ramdisk locks up everything. I noticed a small battery or capacitor on the board-measures 4.25V with S3T powered down. Could this be gone? Keyboard dates on the chips are 1995 I seem to recall. If anyone can help, thanks!

Hi

I would suggest carefully disconnect and re connect the conectors inside the keyboard. I have a few gem kybds and have had similar problems. It may be that one has not reconnected correctly.

A bit of a common fault with them. In later years they spot glued the connectors with a heat glue gun. Worth doing if you move the machine about a lot.

Failing this i will have a re think

Thanks for the input. I tried this once-but with all the grunge that was in this machine, you may be right. Every connector has to be oriented one way, so I thought that was sufficient-possibly a loose connector terminal on the board that was created by my disconnecting and re-connecting-I've noticed a electronic relay-type clicking sound I hadn't noticed before, so there may be an errant connection somewhere, it doesn't take much. I'll check my work again.

Disassembled it again, checked all connections-everything looks fine, but still no ramdisk. Again, I am hearing some kind of clicking as of a relay or mechanical switch of some kind, whenever I power up the instrument that I had noticed before. And it isn't near the power supply, not sure what this could be. Thanks again.

Finally managed to solve this problem. In case anyone else runs into this with the ramdisk, shorting the turboboard's battery terminals momentarily-cuts the voltage to the flash ram chips and clears out the memory contents-seems to have done no harm, all ramdisk functions perform normally again-just have to get to the the turboboard battery, which is just under the keyboard assembly. I used a short piece of wire to the + and - terminals and presto, problem solved.