Battery Problems - Lenovo THINKPAD T40 User Manual

Solution:
This is an intrinsic characteristic of the TFT technology. Your computer's
display contains multiple thin-film transistors (TFTs). A small number of
missing, discolored, or bright dots on the screen might exist all the time.
Problem:
A message, "Unable to create overlay window," appears when you try to
start DVD playback.
or
You get poor or no playback while running video playback, DVD
playback, or game applications.
Solution
Do either of the following:
v If you are using 32-bit color mode, change the color depth to 16-bit
mode.
v If you are using a desktop size of 1280×1024 or larger, reduce the
desktop size and the color depth.

Battery problems

Problem:
The battery cannot be fully charged by the power-off method in the
standard charge time for your computer.
Solution:
The battery might be over-discharged. Do the following:
1. Turn off the computer.
2. Make sure that the over-discharged battery is in the computer.
3. Connect the ac adapter to the computer and let it charge.
If the optional Quick Charger is available, use it to charge the
over-discharged battery.
If the battery cannot be fully charged in 24 hours, use a new battery.
Problem:
Your computer shuts down before the battery status indicator shows
empty.
or
Your computer operates after the battery status indicator shows empty.
Solution:
Discharge and recharge the battery.
Problem:
The operating time for a fully charged battery is short.
Solution:
Discharge and recharge the battery. If your battery's operating time is still
short, use a new battery.
Solving computer problems
Chapter 2. Solving computer problems
27