I have a really old computer that uses SD ram. It has 512 mb of ram and i got more to add on. When i installed the ram, i got keyboard failure. I also tried another stick i have and it was the same problem. The only ram that works is the one previously installed. Here are my computer
Dell OptiPlex GX240 Series Desktop/PC. Memory Type: SDRAM, PC133, SDRAM (non-ECC) Maximum Memory: 1GB Currently Installed Memory: 512MB Total Memory Slots: 2 Available Memory Slots: 1
i made sure i got the same ram pc133.
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More aboutkeyboard failure
possible that you got faulty RAM, or it may lie in the keyboard itself. Try another keyboard if you can- if not, IDK what to say, but good luck.
Name brand computers of that era are notoriously picky when it comes to RAM. Odds are you can only put RAM in the system that is specifically made for it, other types of RAM will either cause odd problems or just won't work.