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BIOS PostCodes
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Intel Motherboards:
T440BX
VC820

  • Dell BIOS Beep Codes
  • Dell BIOS System Messages
  • Dell BIOS Post Codes

 

Dell BIOS Beep Codes:

Beep Codes Possible Causes Corrective Action
1 - 2 No video card detected Reseat the video card
1 - 2 - 2 - 3 BIOS ROM checksum error  
1 - 3 - 1 - 1 DRAM refresh error Reseat the memory modules
1 - 3 - 1 - 3 8742 Keyboard Controller error Reseat the keyboard connector
1 - 3 - 3 - 1 Memory defective or not present Reseat the memory modules
1 - 3 - 4 - 1 RAM failure on line xxx Reseat the memory modules
1 - 3 - 4 - 3 RAM failure on data bits xxx of low byte on memory bus Reseat the memory modules
1 - 4 - 1 - 1 RAM failure on data bits xxx of high byte on memory bus Reseat the memory modules

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Dell BIOS System Messages:

Message Possible Cause Corrective Action
nnnn Cache RAM Passed nnnn KB of system cache RAM has been successfully tested  
nnnn Extended RAM Passed nnnn KB of extended RAM has been tested  
nnnn Shadow RAM Passed nnnn KB of shadow RAM has been successfully tested  
nnnn System RAM Passed nnnn KB of system RAM has been successfully tested  
CD-ROM drive Identified The systems automatic drive type detection feature has identified the CD-ROM drive  
Diskette drive A error; Diskette drive B Error Drive A or B is present but has failed the BIOS POST Ensure that the drive is installed correctly in the chassis and detected correctly in the system setup
Entering Setup The system is starting the system setup program  
Extended RAM Failed at offset: nnnn Extended memory is not working correctly or is not configured correctly at offset: nnnn IF you receive this message after making changes in the system setup program, enter the program and restore the original value(s)
Failing bits: nnnn nnnn is a map of the bits at RAM address that failed the memory test.  Each 1 in the map indicates a failed bit If you receive this message after making changes in the system setup program, enter the program and restore the original value(s)
Fixed Disk n Failure; Fixed Disk Controller Failure The hard drive specified by n is not working or not configured correctly Ensure that the drive is installed correctly in the chassis and defined coracle in the system setup program
Fixed Disk n Identified The system's automatic drive type detection feature has identified the hard disk drive(s)  
Incorrect Drive x type - Run Setup Diskette drive x is not correctly identified in the system setup program Ensure that the drive is defined correctly in the system setup program
Invalid NVRAM media type The system is having a problem accessing NVRAM (CMOS) Set the configuration jumper to Maintenance mode and restart the system to return all settings to their defaults
Invalid system configuration data The system configuration information is the system setup program is incorrect, or the battery charge may be low Enter the system setup program and verify the system configuration, then restart the system
Keyboard controller error The keyboard controller failed it's test If you receive this message after making changes in the system setup program, enter the program and restore the original value(s)
Keyboard error The keyboard is not working correctly The keyboard or system board may need to be replaced
Keyboard error nn The BIOS has detected a stuck key represented by scan code nn Make sure nothing is resting on the keyboard.  If a key appears to be stuck, carefully pry it up.  if the problem persists, you may need to replace the keyboard
Mouse initialized The system's mouse has been found and initialized  
Operating system not found The operating system cannot be located on drive A or drive C Enter the system setup program and confirm that drive A or drive C is properly identified
Parity check 1 nnnn A parity error has been detected on the system bus.  The BIOS attempts to locate the address and display it nnnn.  If it cannot locate the address, it displays ???? instead If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
Parity check 2 nnnn A parity error has been detected on the I/O bus.  The BIOS attempts to locate the address and display it nnnn.  If it cannot locate the address, it displays ???? instead If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
Press <F1> to resume, <F2> to Setup This message is displayed after a recoverable error message Press <F1> to start the boot routine or <F2> to enter the system setup program and change any settings
Press <Del> to enter SETUP Optional message displayed during POST Id desired, press <Del> to enter the system setup program
Previous boot incomplete - Default configuration used After a unsuccessful boot, POST loads default values There may be incorrect values or incorrect settings in the system setup program.  Run the system setup program and attempt to restore the incorrect settings.  If the message reappears, set the configuration jumper to Maintenance mode and restart the system to return all settings to their defaults
Real time clock error The RTC has failed the BIOS test If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
Resource allocation conflict on motherboard The system cannot configure all system board devices without a resource conflict Run the system setup program and try to resolve any obvious resource conflicts.  If the message reappears, set the configuration jumper to Maintenance mode and restart the system to return all settings to their defaults
Shadow RAM failed at offset: nnnn Shadow RAM has failed at offset nnnn in the 64KB block in which the error was detected If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
System battery is dead - Replace and run SETUP The CMOS clock battery indicator shows the battery is dead Replace the battery and run the system setup program to reconfigure the system
System BIOS shadowed The system BIOS has been copied to shadow RAM  
System cache error - cache disabled RAM cache failed the BIOS test.  The BIOS has disabled the cache If you receive this message after making changes in the system setup program, enter the program and restore the original settings
System CMOS checksum bad - run SETUP System CMOS has been corrupted or modified incorrectly, perhaps by an application program that changes data stored in CMOS Run the system setup program and reconfigure the system by either reverting to the default values or by making your own selections
System RAM failed at offset: nnnn System RAM failed at offset nnnn in the 64KB block in which the error was detected If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
System timer error The timer test failed If you receive this message after making changes in the setup program, enter the program and restore the original values(s)
UMB Upper limit segment address: nnnn Displays the address nnnn of the upper limit of the UMB, indicating released segments of the BIOS which may be reclaimed by a virtual memory manager  
Video BIOS shadowed The video BIOS has been successfully copied to shadow RAM  

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Dell BIOS Post Codes:

01 CPU register test in progress
02 CMOS read/write test failed
03 BIOS ROM checksum bad
04 8254 programmable interrupt controller failed
05 DMA controller initialization failed
06 DMA page-register test failed
08 RAM refresh verification failed
09 Starting first-64K RAM test
0A First-64KB RAM IC or data line bad
0B First-64KB RAM odd/even logic bad
0C First-64KB address line bad
0D First-64KB parity error
10 Bit 0 bad in first 64KB
11 Bit 1 bad in first 64KB
12 Bit 2 bad in first 64KB
13 Bit 3 bad in first 64KB
14 Bit 4 bad in first 64KB
15 Bit 5 bad in first 64KB
16 Bit 6 bad in first 64KB
17 Bit 7 bad in first 64KB
18 Bit 8 bad in first 64KB
19 Bit 9 bad in first 64KB
1A Bit 10 bad in first 64KB
1B Bit 11 bad in first 64KB
1C Bit 12 bad in first 64KB
1D Bit 13 bad in first 64KB
1E Bit 14 bad in first 64KB
1F Bit 15 bad in first 64KB
20 Slave DMA register bad
21 Master DMA register bad
22 Master interrupt-mask register bad
23 Slave interrupt-mask register bad
25 Loading interrupt vectors
27 Keyboard-controller test failed
28 CMOS RAM battery bad
29 CMOS configuration validation in progress
2B Video-memory test failed
2C Video initialization failure
2D Video-retrace failure
2E Searching for a video ROM
30 Switching to video ROM
31 Monochrome operation OK
32 Color (CGA) operation OK
33 Color operation OK
34 Timer-tick interrupt in progress (or bad)
35 CMOS shutdown test in progress (or bad)
36 Gate A20 bad
37 Unexpected interrupt in protected mode
38 RAM test in progress or high address line is bad
3A Interval timer channel 2 bad
3B Time-of-day test bad
3C Serial-port test bad
3D Parallel -port test bad
3E Math co-processor test bad
3F Cache-memory test bad

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All information has been gathered with permission of the respective BIOS providers. Although Bios Central has used reasonable effort to ensure accuracy we are unable to verify all codes posted. Use at your own risk. Bios Central, or any person associated with Bios Central takes no responsibility for any dmage resulting from the use of this information.


Copyright © 1988 -  by Bob Hurt. All rights reserved. Bios Central is a trademark of Bob Hurt.

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