Lenovo ThinkPad A21e English - A21e(2655) Service and Troubleshooting Guide - Page 30

Battery problems, If you are using a desktop size of 1280x1024 or larger, reduce the desktop

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Solving computer problems Problem: Incorrect characters appear on the screen. Solution: Did you install the operating system or application program correctly? If they are installed and configured correctly, have the computer serviced. Problem: The screen stays on even after you turn off your computer. Solution: Press and hold the power switch for 4 seconds or over to turn off your computer. Problem: Missing, discolored, or bright dots appear on the screen every time you turn on your computer. 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: "Unable to create overlay window" message appears when you try to start DVD playback. or You get poor playback or non at all while running video playback, DVD playback, or a game. Solution: Do either of the following: v If you are using the computer display and an external monitor simultaneously with 32-bit color mode, change the color depth to 16-bit mode. v If you are using a desktop size of 1280x1024 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 may be over-discharged. Do the following: 1. Turn off the computer. 2. Make sure that the overdischarged 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. 22 ThinkPad® A21e Service and Troubleshooting Guide

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Problem:
Incorrect characters appear on the screen.
Solution:
Did you install the operating system or application program
correctly? If they are installed and configured correctly, have the computer
serviced.
Problem:
The screen stays on even after you turn off your computer.
Solution:
Press and hold the power switch for 4 seconds or over to turn off
your computer.
Problem:
Missing, discolored, or bright dots appear on the screen every time
you turn on your computer.
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:
“
Unable to create overlay window
”
message appears when you try
to start DVD playback.
or
You get poor playback or non at all while running video playback, DVD
playback, or a game.
Solution:
Do either of the following:
v
If you are using the computer display and an external monitor
simultaneously with 32-bit color mode, change the color depth to 16-bit
mode.
v
If you are using a desktop size of 1280x1024 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 may be over-discharged. Do the following:
1.
Turn off the computer.
2.
Make sure that the overdischarged 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.
Solving computer problems
22
ThinkPad
®
A21e Service and Troubleshooting Guide