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.

A31 MotherBoard with the EEPROM, Click on the Picture for a full view

Manufacturer's Manual Click Here! 

Audio
Excellent sound quality with two stereo speakers, 16-bit stereo audio supporting Sound Blaster Pro, built-in stereo speakers
Stereo audio with 3D sound and speaker technology
Volume up, down, and mute buttons
Three audio jacks:
One for external stereo speakers or headphone
One for an external microphone
One for line-in
 
Keyboard
86 key keyboard with Embedded numeric keypad and integrated TrackPoint (TM) with enhanced features
90 DBCS key keyboard with Embedded numeric keypad and integrated TrackPoint (TM) with enhanced features for Japanese systems
Embedded numeric keypad
The keyboard has a Fn key which is a special key and is located in the lower left corner. The Fn key allows the user to instantly activate the following operational features by pressing the Fn key and a designated function key: - Standby/Suspend/Hibernation - Switching between Display devices - Power management mode
Web navigation, 6 total, 3 customizable
ThinkPad button, allowing one-touch entry into Access ThinkPad
ThinkLight which illuminates the keyboard in low light conditions
 
Memory
64-bit Double Data Rate (DDR) non-parity SDRAM memory
PC2100 at 266 MHz
2 memory slots
Supports up to two 512 MB SDRAM SO DIMMs
Supports maximum memory up to 1.0GB
 
Mouse
TrackPoint (R) with Press-to-Select, Internet scroll, and magnifying glass features for accurate and convenient control
Processor
Dual-mode, high-performance Mobile Intel (R) Mobile Pentium (R) 4 Processor-M at 1.6GHz, 1.7GHz, 1.8GHz or 2.0GHz
Enhanced Intel SpeedStep (TM) technology
512 KB onboard L2 cache memory
400MHz front side bus

Communications
Infrared
IR transceiver for wireless file and data transfer and printing.
Speeds up to 4 Mbps.
Compatible with the Infrared Data Association (IrDA) IR data link specification
 
Modem
K56Flex v.90
Note: Public network download speeds are limited to 53kbps. Upload speeds are limited to 31.2kbps. Actual speeds depend on many factors and are often less than the maximum stated. 
Network
10/100 Ethernet and 802.11b wireless, (depending on model)
Bluetooth on select models

Expansion Bays
One, integrated, easy-loading modular Ultrabay (TM) 2000 One, integrated, easy-loading modular Ultrabay (TM) 2000 Plus
UltraPort only on A31p
One Mini PCI IIIb slot
Two Communications Daughter Card slots
 
External ports
Two USB (One on left side, one in back) version 1.1
One Ethernet RJ-45
One parallel (EPP, ECP), IEEE 1284 compatible
One DB-15 external display
One 9-pin serial
Additional connector supports the optional Port Replicator and dock
Audio line in, audio line out, and microphone in ports
S-Video out
S-Video in with MPEG-2 video-capture capability on A31p only
IEEE 1394 FireWire port selected models of the A31p only
 
PC Card
Conforms to the PC Card Standard 95
The Type III slot can accommodate two Type I or two Type II, or one Type III PC card
Both 16-bit and 32-bit cards are supported.
PCMCIA 2.1 standard

Operating environment
Physical specificaitons
Width: 329 mm (13.0 in)
Depth: 272.5 mm (10.7 in)
Height: 44.6 mm to 46.8 mm (1.8 in to 1.9 in)
Travel weight: 3.18 kg (7.0 lb) with Li-Ion battery pack and weight-saver bezels in both bays
Weight: 3.45 kg (7.6 lb) with Li-Ion battery pack and DVD drive
Note: All dimensions are approximate. 
Agency approvals
FCC Class-B Certified to comply with FCC Rules, Part 15
VCCI CLASS B
CISPR22B
UL-1950
CSA C22.2 No. 950
NOM
UK-PTT
JATE
SASO
IEC950
CCIB (for China)
BCIQ (for Taiwan)
ACA (Australia)
EMI Declaration of Conformity (New Zealand)
MPR-II (Sweden)
CE Mark

Power
AC Adapter
AC adapter: This ac-to-dc converter supplies the necessary power to the computer. The ac adapter also charges the battery pack when it is installed in the computer.
Universal AC adapter (72 W):
Input is 100/240 V AC, 1.5/0.9 A, 50/60 Hz
Output is 16 V DC, 4.5 A
 
Battery
The battery pack is an internal power source to the computer when the ac adapter is not available. The battery pack is rechargeable and is charged using the ac adapter with the system.
A six-cell Li-Ion battery pack is shipped with the system. This same battery is also available as an optional feature for the A31 so that you can order a spare battery which works only in Ultrabay 2000
Output voltage: 10.8V
Charging current: 2.8A maximum (system on or off
Approximate operation and charging hours are:
Battery operation 2.0 to 2.5hr (*1) depending on model.
Power off/suspend charging (*2) 2.6 hr
Charging during operation (*2) 3.5 to 6.0 hr Results obtained using eTesting Labs Inc's BatteryMark (TM) Version 4.0.1. Battery life will vary based on many factors including screen brightness, applications, features, power management, battery conditioning, and other customer preferences.
Note:
(*1) BatteryMark (TM) is a trademark of Ziff Davis Publishing Holdings Inc., an affiliate of eTesting Labs Inc., in the U.S. and other countries.
(*2) Recharge time will also vary
Battery overview document.

Security
System
Security Chip on selected models
Locking device in the security slot provides physical security.
 
Password
A Power-on password (POP) protects the system from unauthorized
use. If a POP is set, the password prompt appears:
Each time the system is turned on
When the system is returned to normal operation from suspend mode
A Supervisor Password provides a higher level of security than the POP. The Supervisor Password protects the system functions from being used by unauthorized users, and protects the hardware configuration from unauthorized modification.
A Hard Drive Password (HDP) protects hard drive data from unauthorized users. Once HDP is set, data on the hard drive cannot be accessed without the correct HDP. Because the HDP is stored in the hard drive, the data remains protected even if the hard drive is removed to another system. The HDP password prompt appears:
Each time the system is turned on

Software
Operating system
The following operating systems are supported on the ThinkPad A31 and A31p systems:
Windows 98
Windows 98 Second Edition
Windows NT Workstation 4.0
Windows NT Workstation 4.0 Japanese
Windows 2000
Microsoft Windows XP Professional
Microsoft Windows XP Home

Note: Preloaded software utilizes the disk-to-disk recovery method. 

Storage
Optical drive
8X, 24X, 8X write speed of CD-R media
Bootable
 
Floppy drive
Only included with some systems
Available via USB or Ultrabay 2000
 
Hard drive features
A31 standard 2.5 inch 30GB
A31 standard 2.5 inch 40GB
A31p standard 2.5 inch 60GB
Supports two additional hard drives which can be used concurrently to offer expanded storage
S.M.A.R.T technology to issue an alert if a hardware failure is pending
ATA Bus Interface
5400 rpm
Although you can upgrade the hard drive, it is not designed to be removed and reinserted on a regular basis. Repeated and frequent removal, for purposes other than to upgrade for greater capacity, can cause damage to the system. The Ultrabay 2000 hard drive adapter is designed to provide this flexibility with a second hard drive in the Ultrabay 2000

Video
Display - A31
Large, brilliant 15.0-in SXGA+ (1400 x 1050) or XGA (1024X768) active matrix TFT display

Note: All displays are measured diagonally.
 
Graphic Controller
ATI Mobility Radeon 7500 chipset
AGP 4X
32MB DDR-SDRAM
166MHz bus

Display - A31p
Large, brilliant 15.0-in UXGA (1600 x 1200) active matrix TFT display

Note: All displays are measured diagonally.
 
Graphic Controller
ATI Mobility FIREGL 7800 chipset
AGP 4X
64MB DDR-SDRAM
183MHz bus