IBM L40 SX Quick Reference page 54

3. To change the rechargeable battery while in Suspend Mode,
close the display, wait 5 seconds after the one or two beeps,
replace the battery within 1 minute, and then open the display to
resume operation. If the computer has been in Suspend Mode
because of the low battery power, no beep sounds even though
the display is closed.
4. When you enter Suspend Mode from VM86 mode, a saving in
battery power is smaller.
5. Attached devices, such as a printer and a serial device, may be
reset or lose their configuration when returning to Resume Mode.
The application using the devices should be restarted after
resuming.
6. When you are using the trackpoint or a mouse and the computer
is entering Suspend Mode, stop the trackpoint or mouse operation
until the computer returns to Resume Mode.
Very Important
Do not change the diskette in the drive while the computer is in
Suspend Mode. Otherwise, information from the previous diskette
may be written onto the new one after the computer returns to
Resume Mode.
Operating Your Computer 42