IBM ThinkPad i Series 1800 Troubleshooting Manual page 26

Solving computer problems
If these items are correct, have the computer serviced.
Problem: The
computer immediately turns off.
Solution: The battery power is getting low. Connect the ac adapter to the
computer, or replace the battery pack with a fully charged one.
Problem: The computer display remains blank after you take action to return
from a sleep mode.
Solution: Check whether an external monitor was disconnected while the
computer was in standby mode. Do not disconnect the external monitor
while the computer is in standby mode or hibernation mode. If no external
monitor is attached when the computer resumes, the computer display
remains blank and output is not displayed. This restriction does not depend
on the resolution value.
Problem: The computer does not return from standby mode, or the standby
indicator stays on and the computer does not work.
Solution: The computer automatically enters standby or hibernation mode
when the battery is depleted. Do one of the following:
v Replace the battery with a fully charged one and then press Fn.
v Connect the ac adapter to the computer; then press Fn.
Problem: When you are using the port replicator, resuming normal operation
from hibernation or standby mode takes a long time.
Solution: If the Ethernet port is enabled, but the port replicator is not
connected to a network, resuming operation can take a long time. The
computer queries the Ethernet until the timeout timer stops the query. If you
want to access an Ethernet, connect the network cable. If you are not using
the network, disable the Ethernet port as follows:
For Windows 98:
1. In the Control Panel, double-click the System icon.
2. Click the Device Manager tab.
3. Double-click Network Adapter.
4. Double-click Intel EtherExpress PRO PCI Adapter.
5. Select the Disable in this hardware profile check box.
6. Click OK.
7. Close all windows.
8. Restart the computer.
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ThinkPad A21e Service and Troubleshooting Guide
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