Portege 4000 1 GB memory upgrade?

I have an old laptop Toshiba Portege 4000.
The manual indicates a upgrade memory up to 512 MB (2x256MB) is possible. But the technical specification on toshiba-live website indicates an upgrade memory up to 1 GB (2x512MB) is possible.
I brought 2x512MB (SO-DIMM 512 MB SD RAM SDRAM PC133 PC 133 512 MB 144 PINS) ANONYMOUS memory from ebay and it does not work. The system does not start.

Now my question. Can I go up to 1 GB with the Kingston memory recommended toshiba or it just won't work in general?
Anyone here with experience on that?

Thanks in advance.


normally a portege 4000 is upgradeble up to 1 GB (2 x 512 MB sdram pc133, 3, 3v)

However the architecture and the number of tokens on the modules can cause an incomptability, so I guess that "misfortune."

on ebay-express you can find them for about 50 US$ (search for portege 4000; memory)

Tags: Toshiba

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