APM is legacy technology, not supported by very many PCs anymore. Most will be using ACPI (
so long as you've enabled it, anyway).
The APM 'failed' message is not very important. To stop it, you need to make the /etc/rc.d/rc.apm script non-executable.
Easiest way is to use mc - open a terminal, su to root, start Midnight Commander and navigate to /etc/rc.d Find the rc.apm script (easiest way is to enter ALT-S in mc, then enter 'rc.apm', which will move the cursor to the script).
With the cursor over rc.apm, press CTRL-x, then c. You will get a box with permissions shown for the file under the cursor. Select any of the 'execute' options that show an x and remove the 'x' from the box. Then click on the 'set' option. The file will no longer be execuatble.