IBM SY27-0345-06, Service And Maintenance Manual

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Chapter 3. Diagnostics
The IBM 2210 diagnostic programs test the system hardware and detect hardware
problems. The diagnostic routines include three types of tests:
Ÿ
Power-on self-test (POST)
Ÿ
Extended POST
Ÿ
Menu-driven diagnostics
The diagnostic package includes service aids that may be used to display the diag-
nostic logs and to view the vital product data (VPD).
| Note: When using a locally attached terminal to run the IBM 2210 diagnostic pro-
| grams, the service port line speed must be set to 9600 bps. This setting is a con-
| stant and cannot be changed.
Diagnosing Hardware Problems
Running the diagnostics requires complete control of the IBM 2210.
Attention: Do not shut down the IBM 2210 without the knowledge and permission
of the customer. Contact the customer’s system administrator before shutdown.
Power-On Self-Test
The power-on self-test (POST) provides a basic confidence test of the IBM 2210
processor, memory, and interfaces.
Starting the POST
The POST runs automatically whenever the IBM 2210 is powered on. If the
machine is already powered on and you want to execute the POST:
1
Stop the IBM 2210 by unplugging the power cord from the power outlet.
2
Plug the IBM 2210 into the power outlet.
3
If the system green (OK) LED is off and the system amber LED is on after
about 2 minutes, run the Extended POST.
Extended POST
It is possible to run an extended POST that does not require attachment of a ter-
minal. Extended POST allows you to test memory more extensively than normal
POST. Follow these steps to run diagnostics without a terminal:
1
Stop the IBM 2210 by unplugging the power cord from the power outlet.
2
Disconnect the cables from the ports.
3
Plug the IBM 2210 into the power outlet. Wait for a port green LED to flash
(2 to 3 seconds) and then push the reset button once. (See Figure 1-14 on
page 1-5.)
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Copyright IBM Corp. 1994, 1998
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