Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

An old laptop I bought (IBM ThinkPad T30) has two memory slots but only one seems to work. When I run a memory test it seems to suggest nothing is wrong. If I put a memory module in the other slot on its own it won't work and the system beeps.

The first slot works perfectly yet I have both slots filled with 512MB and the maximum load is 1024MB.

share|improve this question

migrated from May 2 '11 at 17:16

This question came from our site for professional and enthusiast programmers.

You'll probably get more help on – Maxpm May 2 '11 at 17:15

It sounds like the motherboard is defective.

share|improve this answer

Have you tested both SODIMMs in both slots? Are both chips identical?

Have you used the IBM diagnostic or something else?

Any sign of damage on the socket?

share|improve this answer

You must log in to answer this question.