Aaeon PCM-4330 Instructions Manual page 89

This chapter describes the Award PowerBIOS functions of the PowerDwarf single
board computer.
After a (soft- or hardware) reset of the computer, a self-test and initializing of all
hardware components is performed. This test is referred to as POST (Power On Self
Test) .
After a hardware reset, on-screen messages identiftr which component is cur-
rently being tested. If any errors occur during POST, a corresponding message is
displayed on the screen. An error may occur due to hardware failure, i.e. an defec-
tive component, or if the setup configuration is incorrect (e.g. setup information
contains entries for two floppy disk drives while only one drive is actually installed
in the system).
Errors, that occur before the primary display adapter has been initialized, are
indicated by the BIOS through a series of signals tones (beeps). Please refer to
chapter G.I.I for the description of possible signals tones and their meaning. After
the display adapter initialization all errors are reported through on-screen error mes-
sages. A description of error messages is found in chapter 6.I.2 on page 86.
During POST, diagnostic codes are also written to I/O Port 80h. Chapter 6·I*3
on page 89 lists possible diagnostic codes.
1 Beep: Refresh error
Check that the SIMM module is installed properly. If the error still occurs, re-
place the memory chip.
2 Beeps: Parity error
Check that the SIMM module is installed properly. If the error still occurs, re-
place the memory chip.
3 Beeps: Error in the first 64 kB memory area
Check that the SIMM module is installed properly. If the error still occurs, re-
place the memory chip.
4 Beeps: as above, or the timer does not work The board must be replaced.
5 Beeps: CPU error
The board must be replaced.
6 Beeps: Gate Azo error
Check the keyboard controller and supply. Ifnecessary, replace the keyboard
controller.
7 Beeps: CPU asserted unnecessary interrupt
The board must be replaced.