The Picture will show you where the EEPROM is located at, but here goes some of the Manufacturer’s Specs and Manual for this model. If you have the BIN file for this model or addition pictures? Please let me know and I will post it here.

R31 MotherBoard with the EEPROM, Click on the Picture for a full view

Manufacturer's Manual Click Here! 

ThinkPad R31 features

Intel 830 MG chipset Integrated Direct AGP 3D Graphics dynamically allocates system main memory for video memory usage up to 32MB based on application, demand, and available memory resource.

Processor: Systems include either a Mobile Celeron processor at 1.0663GHz and 256KB of on-board cache or Mobile Pentium(TM) III processor-M at 1.13GHz and 512KB of on-board cache.

Memory: Systems have standard system memory of 128MB or 256MB of 133MHz, non-parity, 64-bit SDRAM SO DIMM memory. This is expandable to a maximum of 1 GB with 128, 256, or 512MB SO DIMMS. There are two internal slots for memory modules, one for the 128MB or 256MB of standard memory and one for a memory upgrade. To obtain the maximum 1GB to which memory can be expanded, replace the 128 or 256MB card with a 512MB card and add another 512MB card in the extra slot.

PC Card: Type III slot can accommodate one Type I, one Type II, or one Type III PC card via the lower connector in the slot. Both 16-bit and 32-bit cards are supported.

Storage: Standard 20, 30, or 40GB HDD, depending on model. These HDDs issue an alert if a failure is pending. Optional 20 or 40GB HDDs for system unit. Optional 20, 40, and 60GB HDDs are also available for use in the Ultrabay Plus. The optional second HDD adapter is required. Two HDDs can be used concurrently.

Audio: Excellent sound quality and volume control
Audio jacks:

One for external stereo speakers or headphone
One for microphone-in
One for line-in (on port replicator)
One for line-out (on port replicator)

Other features:
Power
Infrared
Two USB ports
Parallel port
CRT
S-video