IBM Skip to main content
      Home  |  Products & services  |  Support & downloads  |  My account
 Select a language
 
 PC support home
 Online assistant
 Discussion forums
 Warranty lookup
 Downloadable files
 Hints and tips
 Hot news
 Online publications
 Parts information
 Product information
 OS installation
Related links:
Support phone list
Business Partner support
IBM PC Institute
IBM Publications Center
Find a Business Partner
Microsoft Service Packs
PC support home Login Profile My page Ask an expert Help
 
PC Server 500 - POST (S/390)
  Applicable countries/regions
Worldwide
  Service hints & tips

Power-On Self Test (POST)
When you power-on or re-boot the computer, the computer runs the following two power-on self tests (POSTs).

Note
These tests are run consecutively without intervention.

BIOS Code
(resides on the system board)
Checks the memory, system board, direct access storage device (DASD), configuration, etc.. If you receive a POST error from the BIOS code, refer to the "Symptom-to-FRU Index (Micro Channel)" in the PS/2 Hardware Maintenance Manual
Licensed Internal Code (LIC)
(written to files on the hard disk drive)
Checks the P/390 processor card and attached memory card.



If you receive a POST error (165) from the P/390 LIC code, see "Error Reporting (P/390)" in the Hardware Maintenance Manual.
Document id:  DDSE-43WNM8
Last modified:  2001-02-02
Copyright 2002 IBM Corporation
  About IBM  |  Privacy  |  Legal  |   Contact