Microsoft KB Archive/78976

= IBM ROM Diagnostic and Power-On-Self-Test Errors 100-599 =

Article ID: 78976

Article Last Modified on 7/30/2001



This article was previously published under Q78976



SUMMARY
The following is a list of power-on-self-test (POST) error codes that may appear at start-up. These errors are generated by the system prior to the loading of the operating system and usually need to be resolved for successful system usage.



MORE INFORMATION
Code Description

1XX Generally associated with the system board.

101 Main system board interrupt failure 102 System timer failed 103 System timer interrupt failed 104 System - Protected mode error 105 System error- last 8042 command not accepted 106 System Converting logic test 107 System hot NMI test 108 System Timer Bus Test 109 Direct memory access test error 110 PS/2 System board error; Parity check error 111 PS/2 Memory adapter error 112 PS/2 MicroChannel arbitration error 113 PS/2 MicroChannel arbitration error 121 Unexpected hardware interrupts occurred 131 Cassette wrap test failed 161 Systems options (CMOS) run setup Battery bad 162 Systems options not set run setup 163 Time and Date not set run setup 164 Memory Size error run setup 165 PS/2 Systems options not set* 166 PS/2 MicroChannel adapter time-out error* 199 User indicated configuration not correct * Nearly all PS/2 systems require supplemental drivers on diskette, these drivers are included on               the original Reference diskette. For MicroChannel devices there is usually a diskette that comes with the device that will install the device or               the appropriate driver.

2XX    Memory test errors *

201 Memory test failed 202 Memory address error 203 Memory address error

* Many times the 2XX error will be displayed with numerical suffixes indicating the actual location where the error has occurred generally telling you if it is a system board error or an add-on memory card error.

3XX    Keyboard errors *

301 Keyboard did not respond to software reset correctly or a stuck key was detected. If a stuck key was detected, the scan code for the key may be displayed in hexidecimal, (this is not always            the case with a stuck key; however, if the scan             code is returned it is always in hexadecimal). For example, the error code &quot;49 301&quot; indicates that key 73, the PAGE UP key has failed (49 hex =            73 decimal). 302 User indicated error from the keyboard test or AT             class machine keylock is active, unlock the keyboard. 303 Keyboard or system error. 304 Keyboard or system error; CMOS does not match system. 305 PS/2 Keyboard fuse (on system board) error.

*On some occasions none of the above keyboard errors occurs but the keyboard will tell you that there is a problem using its LED display. Normally the LEDs will flash ONCE after the power is applied to the system unit; errors will be indicated by any deviance to this norm, that is, the LEDs will flash on and off continuously, they will not flash at all, or they will cycle one to the other.

4XX Monochrome Monitor errors

401 Monochrome monitor test, horizontal sync., frequency test, or video test has failed. (Also PS/2 system board parallel port error) 408 User indicated display attributes. 416 User indicated character set failure. 424 User indicated 80x25 mode failure. 432 Parallel port test failed (monochrome adapter,             generally at 03BC hex; however, ATI has CGA, EGA             video cards with &quot;Piggy-back&quot; parallel and serial             ports that are user selectable).

5XX    Color monitor errors.

501 Color memory test failed, horizontal sync., frequency test, or video test failed. 508 User indicated display attribute failure. 516 User indicated character set failure. 524 User indicated 80x25 mode failure. 532 User indicated 40x25 mode failure. 540 User indicated 320x200 mode failure. 548 User indicated 640x200 mode failure.

24xx Enhanced Graphics Adapter (EGA) errors 24xx PS/2 System board Video Graphics Array (VGA) errors

39xx Professional graphics controller errors

74xx IBM PS/2 Display adapter (VGA Card) errors The listing of error codes contained in this article are specific error codes for IBM hardware. These codes may or may not correspond correctly to non-IBM computers.

