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.

G40 MotherBoard with the EEPROM, Click on the Picture for a full view

Manufacturer's Manual Click Here! 

Audio
Analog Devices AD1981A AC'97 SoundMAX- Codec
AC97 2.2 compatible
Speaker technology
stereo speaker
Volume up, down, and mute buttons
Two audio jacks:
1/8" Input Jack, Mono Microphone
1/8" Stereo Headphone Output Jack
 
Keyboard
86 key keyboard with imbedded numeric keypad and integrated UltraNav dual-pointing system, featuring TrackPoint and customized touch pad for the ultimate in pointing flexibility 90 DBCS key keyboard with imbedded numeric keypad and integrated UltraNav dual-pointing system, featuring TrackPoint and customized touch pad for the ultimate in pointing flexibility 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 device
 
Memory
64-bit Double Data Rate (DDR) non-parity SDRAM memory
PC2100 at 266MHz
Two 200 pin SO-DIMM memory slots, one slot is pre-populated with 128MB or 256MB, leaving one socket available
Supports up to two 512MB SDRAM SO DIMM
Supports maximum memory up to 1GB
 
Mouse
All systems come with the TrackPoint pointing device with Internet scroll bar, (requires Internet access, not included) Press-to-Select, and magnifying functions to help you breeze through Web pages and spreadsheets
 
Processor
Available processors are
Intel Pentium 4 DT at 2.4GHz, 2.6GHz, 2.8GHz, 3.0GHz
Intel Celeron DT at 2.0GHz
CPU throttling
Pentium models have 512KB onboard L2 cache memory
Celeron models have 128KB onboard L2 cache memory
 
Communications
Modem
Selected models have a modem communication daughter card (CDC)
K56Flex v.92
Note: Public network download speeds are limited to 53kbps. Upload speeds are limited to 48Kbps. Actual speeds depend on many factors and are often less than the maximum stated. 
Network
10/100 Ethernet installed on systems via the system board
Intel 802.11b wireless LAN on selected models
IBM High Rate Dual-band 802.11a/b Wireless on selected models
 
Expansion Bays
One Mini PCI III slot (not CRU)
One CDC II slot (not CRU)
 
External ports
Four USB ports version 2.0
One parallel (EPP, ECP) compatible
Two audio ports
One for external stereo speakers or headphone
One for microphone-in
CRT port for external monitor
Built-in RJ-11 and RJ-45 connectors for telephony and LAN connections
 
PC Card
Conforms to the PC Card Standard 95
The Type III slot can accommodate one Type I, one Type II, or one Type

III PC card
Both 16-bit and 32-bit cards are supported.
PCMCIA 2.1 standard
No zoom video support
 
Operating environment
Physical specificaitons
System:

Width: 329.0 mm (12.95 in)
Depth: 282.5 mm (11.12 in)
Height: 37.1 to 50.9 mm (1.46 to 2.00 in)
Weight:
14.1 in: 3.5 kg (7.6 lb)
15.0-in: 3.6 kg (7.9 LB)
Accessories:

Li-Ion 6-cell: 355 g (0.78 LB)
Li-Ion 12-cell: 627 g (1.38 LB)
NiMH 8-cell: 570 g (1.26 LB)
Note: Actual specifications and weights may vary based on features, vendor components, or manufacturing processes. 
Temperature specifications
Heat dissipation: 410 Btu/hr maximum
Heat emissions: 120 watts maximum 
 
 
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 (120 W):
Input is 100/240 V ac, 1.5 A, 50/60 Hz
Output is 16 V dc, 7.5
 
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. You can determine how much battery power remains by using the fuel- gauge ThinkPad utility program, which displays the percent charge remaining.
A different Li-Ion battery pack fits into the Ultrabay Slim so that two batteries can be installed to increase battery operating time. A six or twelve cell Li-Ion battery or an eight cell NiMH battery pack is shipped with the system.
Battery pack:
Li-Ion
6 cell: 10.8 V, 4.4 AH
12 cell: 10.8 V, 8.8 AH
NiMH
8 cell: 9.6 V, 4.5 AH
Approximate operation and charging time
Charging
State of operation 8 cell NiMH 6 cell Li-Ion 12 cell Li-Ion
Power off/suspend charging 2.5 hours 3.0 hours 4.5 hours
Charging during operation 3.5 hours 3.0-5.0 hours 4.5-8.5 hours
Hours of operation
6 cell Li-Ion battery 1 hour 45 minutes
8 cell NiMH battery 1 hour 12 minutes
12 cell Li-Ion battery 3 hours 30 minutes

Notes: (*1) Recharge time also varies.
(*2) These model numbers achieved eTesting Labs, Inc.'s BatteryMark 4.0.1 or the Ziff Davis Media Inc.'s Business Winstone 2002 BatteryMarkTM Version 1.0 Battery Rundown Time of at least the times shown above. This test was performed without independent verification by VeriTest testing division of Lionbridge Technologies, Inc. ("VeriTest") nor Ziff Davis Media Inc.; neither Ziff Davis Media Inc. nor VeriTest makes any representations or warranties as to these test results. A description of the environment under which the test was performed is available at: www.ibm.com/pc/ww/thinkpad/batterylife.html. Battery life (and recharge times) will vary based on many factors including screen brightness, applications, features, power management, battery conditioning and other customer preferences.
 
Security
System
A 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. The Supervisor Password prompt appears: When the BIOS setup screen is accessed.
A HDD Password (HDP) protects HDD data from unauthorized users. Once HDP is set, data on the HDD cannot be accessed without the correct HDP. Because the HDP is stored in the HDD, the data remains protected even if the HDD 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 G40

systems:
Windows XP Professional
Windows XP Home Edition
Windows 2000 Professional
Windows 98 SE
Note: Previous versions of these operating systems are not supported.
 
Storage
Optical drive
24x/10x/24x/8x CDRW/DVD
Bootable
 
Floppy drive
Included with all models as a fixed drive.
 
Hard disk drive (HDD) features
Supported HDD thickness: 9.5mm for all systems
Standard 20GB, 30GB, 40GB, 60GB HDD sizes.

S.M.A.R.T technology to issue an alert if a hardware failure is pending
ATA Bus Interface
 
Video
Display
14.1 inch XGA(1024x768)
15 inch XGA (1024x768)
15 inch SXGA+(1400x1050) TFT color

Notes:
All displays are measured diagonally.
 
Graphic Controller
Integrated Intel Extreme Graphics with dynamic video memory technology,

up to 32MB (UMA)
 
Notes:

(*1) - Supported in panning mode only.
(*2) - Supported in panning mode only on the 1024x768 LCDs.

Note: When the LCD and external monitor are used at the same time, the refresh rate may be lower.