Hi Scott Sorry I forgot to enter a subject in my last post. I installed 8gb of ram in my Thinkpad T 550 but only 4gb shows in System in the Control Panel and the BIOS. I really took my time installing it hope I don't have to remove the base cover again. Thanks for your time. warm regards dak
What brand of Memory (RAM) did you install?
You could download a bootable UBCD disc to test out that computer. Get scott new book upgrading and repairing pc the 22 edition and watch the video he talks about the UBCD and shows you how to run the memory tester.
What version of windows do you have my guess it would be windows vista or higher.
hope this helps and also do what scott said to check. Could be bad memory or a bad memory socket. I have worked on a IBM think pad a few years ago and that one had a bad memory socket. something to check into.
Have fun are computer a pain in the butt. oops not it Microsoft that is a huge pain in the A**. LOL !!!!!!!!!!!!!!