OK ive just got myself a latitude 2100 and would really love to have this with 3GB's of RAM, before i purchased it i did read online several post of people claiming to have successfully upgraded with a 2GB stick but now for the life of me cannot find it again! Anyway i have already tried 3 different 2GB sticks myself and thought maybe its a good idea to start a thread for the sticks that have been tried and DONT work, this may save someone wasting there money and help us find the sticks that do. Below i have listed the memory as brand, model and timings. Please feel free to add the RAM you have tried.
Samsung 2GB 2Rx8 PC2 6400S 666-12-E3 No Boot
Geil GX2S6400 2GB PC2 6400 CL 5-5-5-15 No Boot
Crucial CT25664AC800 2GB PC2 6400 CL6 No Boot
I would also like to add that i upgraded the BIOS from a02 to a04 which was also "No boot"