Acer Altos R710, Service Manual

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Chapter 4 102
POST Error Codes
During POST after the video has been initialized, the BIOS outputs the current boot progress codes on the
video screen. Progress codes are 32-bit quantities plus optional data. The 32- bit numbers include class,
subclass, and operation information. Class and subclass point to the type of the hardware that is being
initialized. Operation represents the specific initialization activity.
Based on the data bit availability to display the progress code, a progress code can be customized to fit the
data width. The higher the data bit, higher the granularity of allowable information. Progress codes may be
reported by system BIOS or option ROMs.
The response section in the following table is divided into three types:
T
Warning: The message is displayed on screen and the error is logged to the SEL. The system will
continue booting with a degraded state.
T
Pause: The message is displayed on the screen and the boot process is paused until the appropriate
input is given to either continue the boot process or take corrective action.
T
Halt: The message is displayed on the screen, an error is logged to the SEL, and the system cannot boot
unless the error is corrected.
The error codes are defined by Intel and whenever possible are backward compatible with error codes used
on earlier platforms.
All POST error codes are logged in the System Event Log.
Keyboard/Interface Error Keyboard Controller failure. This may indicate a problem with system hardware.
Unlock Keyboard PS2 keyboard is locked. User needs to unlock the keyboard to continue the
BIOS POST.
System Halted The system has been halted. A reset or power cycle is required to reboot the
machine. This message appears after a fatal error has been detected.
USB BIOS Error Messages
Message Displayed Description
Warning! Unsupported USB
device found and disabled! This message is displayed when a non-bootable USB device is enumerated and
disabled by the BIOS.
Warning! Port 60h/64h
emulatin is not supported by
this USB Host Controller! This message is displayed to indicate that port 60h/64h emulation mode cannot
be enabled for this USB host controller. This condition occurs if USB KBC
emulation option is set for non-SMI mode.
Warning! EHCI controller
disabled. It requires 64bit
data support in the BIOS. This message is displayed to indicate that EHCI controller is disabled because
of incorrect data structure. This condition occur if the USB host controller needs
64-bit data structure while the USB is ported with 32-bit data structure.
SMBIOS BIOS Error Messages
Message Displayed Description
Not enough space in
Runtime area!!. SMBIOS
data will not be available. This message is displayed when the size of the SMBIOS data exceeds the
available SMBIOS runtime storage size.
Error Codes and Messages
Error Code Error Message Response
0000 Timer Error Pause
0003 CMOS Battery Low Pause
Miscellaneous BIOS Messages
Message Displayed Description