Power-On Self-Test (POST)
Power-On Self-Test (POST)
Each time you power-on the system, it performs a series of tests that
check the operation of the system and some options. This series of
tests is called the power-on self-test, or POST.
POST does the following:
- Checks some basic system-board operations
- Checks the memory operation
- Starts the video operation
- Detects and initializes ISA devices
- Detects and initializes EISA devices
- Detects and initializes PCI devices
- Verifies that the diskette drive, hard disk drive is working and
other installed devices are working
Check (e.g. Server 704) the indicator lights on the front of the server and
the back of the power supplies. Verify that all server devices are operating properly.
If a device is not operating properly, ensure that it is not defective and is installed
correctly. Replace defective devices and reinstall any device that is not installed correctly.
If the POST finishes without detecting any problems,
a single beep sounds and the first screen of your operating system or
application program appears. If no operating system is installed, the system
prompts you to insert a startable diskette.
If POST detects a problem, an error message appears on
the screen. A single problem can cause several error messages to
appear. When you correct the cause of the first error message,
the other error messages probably will not appear on the screen the next time
you turn on the system.
POST Beep Codes
The Power On Self-Test generates a beeping sound
to indicate successful completion of POST or
to indicate that the tests detect an error.
One beep and the appearance of text on the display indicates successful
completion of the POST. More than one beep
indicates that the POST detects an error.
Test Programs
The AQPlus/PRO test programs, developed by
DiagSoft for IBM , are the primary method of
testing the PC Server. You can use them to test the IBM components
of the system and some external devices. The amount of time required to
test all components depends on the number of components. The more optional
adapters and devices you have attached to your system, the longer the
testing takes.
The test programs on the Diagnostic Diskette include the following features:
| Feature |
Description |
| Advanced Diagnostic Tests |
Identifies most problems associated
with the following major components:
° System board
° Hard disk drives
° Diskette drives
° CD-ROM drives
° RAM
° Serial and parallel ports
° Video adapter
° Printer
° Keyboard
° Mouse |
| Flexible Test Control |
Allows you to:
° Run groups of tests in batch
° Specify parameters to use for each test
(for example, video modes, disk
cylinders, and port addresses
and so on)
° Specify the number of passes you want to run
(one to continuous)
° Log the test results to a text dBase (DBF)
format file
° Save all test settings for future use
° View System Information
° View the server's configuration information.
(For example, you can view the IRQ/DMA assignments
memory usage, and device drivers)
° Select System Utilities
° Run a low-level format also contains system
utilities.
° Format a diskette |
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