+ 1 Votes Could be a couple of things here OH Smeg 1 year ago But without knowing which version of XP you have and the Make & Model of the Tablet it's impossible to suggest anything but making sure that the unit is upgraded to XP SP3 and that any RAM Management Software that came with it is installed and running. Col + 0 Votes Does your tablet have some method of accessing the BIOS, wizard57m-cnet Moderator 1 year ago like on desktop/laptops you can press sometimes the ESC key, or one of the F keys, like F1, then you can check to see if the RAM is being detected...if not, then it may not be seated properly and you'll need to disassemble the tablet and reseat the RAM. + 0 Votes Hello Zenith545 1 year ago Interesting that you say this additional memory was working until your hard drive quit. How did you verify the hard drive failure?? Possible that the memory failed or was causing issues that mimicked a HD failure?? In any case, replacing or removing the hard drive should have no bearing on how much memory is reported within the CMOS/BIOS System setup program. If you have a USB floppy drive or USB CD drive, you can go here to download a bootable version of memtest: http://www.memtest.org/#downiso My experience has been if the BIOS doesn't see it, something is wrong with the memory or the card slot. You don't by chance have any other RAM modules you can try?? + 0 Votes dumb me! RAM is plug N play JADavis9 1 year ago I got it workin' finally by just wiggling the RAM chip a bit and suddenly it is there. I have NO IDEA how, where or why I thought that someone had told me a few months ago that it wasn't PNP and they had told me what I needed to do to have it recognized. DUMB ME! NEXT time I'll Google stuff before I start askin' Questions!