Thinkpad R40 - help need to locate the security chip on mobo

[Tim82]

A friend of mine has an oldie Thinkpad R40 (I think, it's a 15" model), which refuses to boot. The beep codes indicate a problem with the system board (especially the security chip), like in this old thread: http://forum.thinkpads.com/viewtopic.php?t=10892.

My questions:
- is it possible to replace the security chip to solve this error?
- if yes, then what chip should be to replaced and where is this located on the motherboard?

I found a guide on the web, but I'm not exactly sure the mentioned ATMEL 24RF08 chip is the security chip needed to be replaced.

Any help appreciated, thanks in advance!

[RealBlackStuff]

That Atmel chip is an EEPROM, but not what you are looking for.
Get the R40 HMM (link at top of page) and check page 109.

[Tim82]

Thank You, I passed the information to the R40's owner.