Having problems with your IBM ThinkPad T20 2647 Notebook ?

Thinkpad T20 won't accept memory upgrade

\015 My T20 has 256MB memory and I want to upgrade to 512MB. I have bought two sets of chips - PC100 and PC133 and neither works. No combination of slots or memory cards work either. The only thing that boots are the two 128 MB PC100 memory cards that came with the machine. Is there some switch I need to change in BIOS? Any ideas? The machine runs Ubuntu nicely and I would like to add more memory to increase response time.\015

Answers :

According to ibm
\015\012you are allowed only pc100 memory with a maximum of 512mb.
\015\012when handling memory make sure you are grounded before touching any memory chips.
\015\012try getting another set of 256mb chips and grounding yourself before installing them.
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