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
  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).

These tests are run consecutively without intervention.

(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