IBM ThinkPad T41 series User Manual

Note: Recharging will take at least 3 hours, even if the
indicator does not turn on.
If the voltage is still less than +11.0 V dc after
recharging, replace the battery.
4. If the voltage is more than +11.0 V dc, measure the
resistance between battery terminals 4 and 5. The
resistance must be 4 to 30 K .
If the resistance is not correct, replace the battery
pack. If the resistance is correct, replace the system
board.
Checking the backup battery
Do the following:
1. Power off the computer, and unplug the ac adapter
from it.
2. Turn the computer upside down.
3. Remove the battery pack (see “1010 Battery pack” on
page 68).
4. Remove the backup battery (see “Checking the battery
pack” on page 40).
5. Measure the voltage of the backup battery. See the
following figure.
Red (+)
Black (-)
Wire Voltage (V dc)
Red +2.5 to +3.2
Black Ground
v If the voltage is correct, replace the system board.
v If the voltage is not correct, replace the backup battery.
v If the backup battery discharges quickly after
replacement, replace the system board.
Checkout guide
General descriptions 41

IBM ThinkPad T41 series Specifications

General

Operating System	Windows XP Professional
Weight	2.2 kg (4.9 lbs)
Chipset	Intel 855PM
Processor	Intel Pentium M
Display	14.1 inch
RAM	256 MB to 2 GB
Storage	30 GB to 80 GB HDD
Dimensions	311 x 255 x 26-30 mm
Display Resolution	1024x768 (XGA) or 1400x1050 (SXGA+)
Optical Drive	DVD-ROM, CD-RW/DVD-ROM Combo
Wireless	802.11b or 802.11g
Ethernet	10/100 Mbps
Battery	6-cell Li-Ion
Networking	Modem and Ethernet
Ports	2 USB 2.0, VGA, parallel, serial, infrared
Graphics	ATI Mobility Radeon 7500
Hard Drive Interface	Ultra ATA/100