CF-M34 RAM Problem

[wasp61]

I have three Panasonic Toughbook CF-M34 laptops. All have 933mhz processors, 256 mg RAM and 100G+ HDD. I bought them as parts or repair machines and after a few problems were worked out, they all run great.
The one problem that I can't seem to solve is how to add additional RAM. I have tried adding 256 mg using the directed chip (256mg pc133 3.3v sodimm sdram) but once installed all the machines wil do is beep at me and not boot up. I don't have a clue as to what is wrong.
Anybody got any ideas?

[TrekCaptainUSA]

You checked the beep codes to see what the problem was (as in what the beeps mean)?

**EDIT: The beeps that wasp61 heard are called "beep codes", and different patterns and lengths relate to different problems. Usually when you hear these, it's a good idea to google what they mean, because they are important.**

[wasp61]

Beep codes? Never heard of them.

[wasp61]

OK, Beeps relate incompatiable or defective new memory module. Thanks TC!

[TrekCaptainUSA]

No problem.

Oh, and if you hear any beeps in the future during boot, assume that its a beep code, and google what it means.

[TrekCaptainUSA]

Sorry for the post spam, but one last thought:

If you want to check and see what RAM is compatible with your computer, you can always try and use this: http://www.corsair.com/configurator/default.aspx

If your computer isn't listed there, then google it.

[CCT]

Link to a Service Manual; http://www.telcodata.us/~myself/CF-M34%20SERVICE%20MANUAL.pdf

edit: and this interesting tidbit from Wiki;

"Q: Can you upgrade the RAM past 192mb?

A: Yes, but not very efficiently.. 128mb in the slot gives you 192mb total, 256mb in the slot gives you 192mb again but a 512mb gives you 256mb in total. So if you have a spare 512mb SODIMM going to waste its worth doing. (Update: See memory module density for a possible explanation!) (Update 2: the 256/512mb upgrade was with this SO-DIMM)"

http://toughbook.wikispaces.com/cf-m34