When an error is detected, the BIOS program will:
Display the error to the screen, if possible.
Generate a POST beep code using the computer's internal speaker if it cannot access the display adaptor.
Provide a POST code output that can be read using a special hardware tool.
Beep Codes
The only AwardBIOS beep code indicates that a video error has occurred and the BIOS cannot initialize the video screen to display any additional information. This beep code consists of a single long beep followed by two short beeps. Any other beeps are probably a RAM (Random Access Memory) problems.
Screen Error Messages
The following messages are examples of messages including errors detected by the BIOS during POST and a description of what they mean and/or what you may do to correct the error.
BIOS ROM checksum error - System halted
The checksum of the BIOS code in the BIOS chip is incorrect, indicating the BIOS code may have become corrupt. Contact your system dealer to replace the BIOS.
CMOS battery failed
The CMOS battery is no longer functional. Contact your system dealer for a replacement battery.
CMOS checksum error - Defaults loaded
Checksum of CMOS is incorrect, so the system loads the default equipment configuration. A checksum error may indicate that CMOS has become corrupt. This error may have been caused by a weak battery. Check the battery and replace if necessary.
CPU at nnnn
Displays the running speed of the CPU.
Display switch is set incorrectly
The display switch on the motherboard can be set to either monochrome or color. This message indicates the switch is set to a different setting than indicated in Setup. Determine which setting is correct, and then either turn off the system and change the jumper, or enter Setup and change the VIDEO selection.
Press ESC to skip memory test
The user may press Esc to skip the full memory test.
Floppy disk(s) fail
Cannot find or initialize the floppy drive controller or the drive. Make sure the controller is installed correctly. If no floppy drives are installed, be sure the Diskette Drive selection in Setup is set to NONE or AUTO.
HARD DISK initializing,Please wait a moment
Some hard drives require extra time to initialize.
HARD DISK INSTALL FAILURE
Cannot find or initialize the hard drive controller or the drive. Make sure the controller is installed correctly. If no hard drives are installed, be sure the Hard Drive selection in Setup is set to NONE.
Hard disk(s) diagnosis fail
The system may run specific disk diagnostic routines. This message appears if one or more hard disks return an error when the diagnostics run.
Keyboard error or no keyboard present
Cannot initialize the keyboard. Make sure the keyboard is attached correctly and no keys are pressed during POST. To purposely configure the system without a keyboard, set the error halt condition in Setup to HALT ON ALL, BUT KEYBOARD. The BIOS then ignores the missing keyboard during POST.
Keyboard is locked out - Unlock the key
This message usually indicates that one or more keys have been pressed during the keyboard tests. Be sure no objects are resting on the keyboard.
Memory Test:
This message displays during a full memory test, counting down the memory areas being tested.
Memory test fail
If POST detects an error during memory testing, additional information appears giving specifics about the type and location of the memory error.
Override enabled - Defaults loaded
If the system cannot boot using the current CMOS configuration, the BIOS can override the current configuration with a set of BIOS defaults designed for the most stable, minimal-performance system operations.
Press TAB to show POST screen
System OEMs may replace the Phoenix Technologies' AwardBIOS POST display with their own proprietary display. Including this message in the OEM display permits the operator to switch between the OEM display and the default POST display.
Primary master hard disk fail
POST detects an error in the primary master IDE hard drive.
Primary slave hard disk fail
POST detects an error in the secondary master IDE hard drive.
Resuming from disk, Press TAB to show POST screen
Phoenix Technologies offers a save-to-disk feature for notebook computers. This message may appear when the operator re-starts the system after a save-to-disk shut-down. See the Press Tab & message above for a description of this feature.
Secondary master hard disk fail
POST detects an error in the primary slave IDE hard drive.
Secondary slave hard disk fail
POST detects an error in the secondary slave IDE hard drive.
POST Codes
POST Codes are hexadecimal codes generated by the BIOS during the POST operation. These codes may be monitored on a special hardware "POST card" which displays them using a two digit alphanumeric display.
ISA POST codes are output to port address 80h.
EISA POST codes are typically output to port address 300h.
(Source : http://www.phoenix.com)
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