i just acquired a 240Z from Ebay today (Item #180601050694). I cant seem to find the max ram it can take and searching the lenovo site doesn't help since it tells me type 2609-81k doesn't exist. I would like to max out its specs as much as possible. It is a 600mhz model with Ethernet and an 8x6 LCD. I wasn't prepared for how solid these machines are or how small. I compared its sturdiness to a 570e and although they look similar the 240 is much more solid than the 570. i am very impressed by these little things and hope to bring out the max potential of mine.

I'm also a happy owner of a 240 (no Z) and was impressed like you by the quality, and how sturdy and sleek they are. They're really great nice machines. Enjoy yours!

The maximum amount of RAM you can install is 256MB low-density PC100, but in order to do that you need to disable the onboard RAM. The i Series 1124 that I had is the 240Z's twin (and is even rarer than the 240Z), and the person who owned it before me mechanically destroyed the onboard RAM to disable it. But I think there is a software method to disable it as well -- try to do a keyword search for that method on this forum.

The 2609-81K was a Korean rather than Japanese model, and so I looked it up on Lenovo's Korea site and found the specs:

제품: ThinkPad 240Z 2609-81K [변경]
운영체제: 전체 [변경]

시스템 기본사양: PIII-600MHz, 64MB RAM, 10GB HDD, 10.4 SVGA TFT LCD, LT 56K Modem, Win 98 SE

I strongly recommend you to keep searching for a 240Z that has an XGA screen, i.e. 1024x768. IMO, it's the XGA resolution that separates the 240Z (and the i Series 1124) from the 240X and 240.