Satellite P100-487 - Upgate to 4GB RAM did not work

Hi,
I have a P100-487 with 1GB RAM (2x 512MB) inside.
Max. Upgateable is 4GB.
I bought 2x 2GB and this will not work.
BIOS does not start with 4GB.
There is no problem with any of the two 2GB pieces. On both banks.
I update the BIOS to the latest version - the same problem.
Anyone any idea?
thx
tgovsx

In the past many people were reported about such or similar issues after RAM upgrade. Problem is RAM compatibility.
You must use 100% compatible modules and two identical modules.
Ive checked Kingston page and I found info that you can use 2Gb memory with part number KTT667D2/2G. Toshiba offers the same memory modules with part number PA3513U-1M2G.
Which modules do you use (manufacturer, part number)?

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Satellite P100-487 - Upgate to 4GB RAM did not work

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