Acer Altos G520 series, Service Manual

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67 Altos G520
POST Error Codes and Messages
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.
Warning : The message is displayed on screen and the error is logged to the SEL. The system will continue
booting with a degraded state.
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.
Halt : The system cannot boot unless the error is corrected.
Error Code Error Message Response
0000 Timer Error Pause
0003 CMOS Battery Low Pause
0004 CMOS Settings Wrong Pause
0005 CMOS Checksum Bad Pause
0008 Unlock Keyboard Halt
0009 PS2 Keyboard not found Not an error
000A KBC BAT Test failed Halt
000B CMOS memory size different Pause
000C RAM R/W test failed Pause
000E A: Drive Error Pause
000F B: Drive Error Pause
0010 Floppy Controller Failure Pause
0012 CMOS time not set Pause
0014 PS2 Mouse not found Not an error
0040 Refresh timer test failed Halt
0041 Display memory test failed Pause
0042 CMOS Display Type Wrong Pause
0043 ~<INS> Pressed Pause
0044 DMA Controller Error Halt
0045 DMA-1 Error Halt
0046 DMA-2 Error Halt
0047 Unknown BIOS error. Error code = 147 (this is really a
PMM_MEM_ALLOC_ERR) Halt
0048 Password check failed Halt
0049 Unknown BIOS error. Error code = 149 (this is really
SEGMENT_REG_ERR) Halt
004A Unknown BIOS error. Error code = 14A (this is really
ADM_MODULE_ERR) Pause