I just got a new TS140 70A4-001MUX and opened it up to look inside. There was a pin connector labeled LEO_CHIP at the bottom of the motherboard. Looking on page 15 of ( http://download.lenovo.com/ibmdl/pub/pc/pccbbs/thinkservers/ts140hmm_en.pdf ) it would be between 19 and 20. It has 19 pins (20 minus pin #4).
The pin connector is the header for the TPM (Trusted Platform Module) which is a security feature.
According to Wikipedia,
"The Trusted Platform Module (TPM) is an international standard for a secure cryptoprocessor, which is a dedicated microprocessor designed to secure hardware by integrating cryptographic keys into devices. The TPM technical specification was written by a computer industry consortium called the Trusted Computing Group (TCG). The International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) standardized the specification as ISO/IEC 11889 in 2009."
Note that this is not available on all models.
On the models that have this feature, you will be able to configure/ enable this in BIOS.
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