IBM PS/2 Model 25 Troubleshooting Guide: Difference between revisions

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Revision as of 00:16, 16 July 2026 edit Josh (talk \| contribs) Bureaucrats, Interface administrators, Moderators, Suppressors, Administrators 6,546 edits Expand troubleshooting: RIFA/tantalum + Dallas/planar battery (161/163) + POST codes; cited ← Older edit		Latest revision as of 13:06, 16 July 2026 edit undo Josh (talk \| contribs) Bureaucrats, Interface administrators, Moderators, Suppressors, Administrators 6,546 edits Add representative photo (Wikimedia Commons, attributed on file page)
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			[[File:IBM PS-2 Model 25 (photo).jpg\|thumb\|right\|300px\|IBM PS/2 Model 25. Source: Wikimedia Commons.]]
	This guide covers diagnostic procedures and the complete IBM PS/2 numeric POST error code reference applicable to the Model 25 (8525). The PS/2 BIOS uses a "Major Error Code / Minor Diagnostic Error Code" structure that is mostly identical to the PC/AT 1xx–19xx codes but extends them with many PS/2-specific minor codes. Codes specific to MCA hardware (which the Model 25 does not have) are excluded. SCSI- and Pageprinter-specific codes are not listed.		This guide covers diagnostic procedures and the complete IBM PS/2 numeric POST error code reference applicable to the Model 25 (8525). The PS/2 BIOS uses a "Major Error Code / Minor Diagnostic Error Code" structure that is mostly identical to the PC/AT 1xx–19xx codes but extends them with many PS/2-specific minor codes. Codes specific to MCA hardware (which the Model 25 does not have) are excluded. SCSI- and Pageprinter-specific codes are not listed.