|
|
|
NOTE: To check if the cover kit has already been installed, look at the plug toward the left side of the docking station (this plug connects to the AC adapter port at the left-rear of the computer). If the plug has a one-eighth inch deep shoulder, the cover kit has already been installed. If the plug has a one-quarter inch deep shoulder, the cover kit has not yet been installed.
To continue the diagnostics of other devices, remove these SCSI devices from the installed device list before starting diagnostics.
When the Problem Determination Procedure in the operation manual
that is supplied with the adapter or device says
'Have the system unit serviced', the system unit stands for
the computer and this 3550 Expansion Unit.
+---+
|001|
+---+
- Power-off the 3550 Expansion Unit and all external devices.
- Remove the computer from the 3550 Expansion Unit.
- Diagnose the computer problem first.
DID THE TEST COMPLETE WITHOUT ANY ERRORS ?
+---+
Yes No-+002| Have the computer serviced.
+-+-+ +---+
|003|
+---+
- Install the computer on the 3550 Expansion Unit again and make sure that
the computer is firmly connected.
- Check all cables and power cords.
NOTE:
1. The mouse or other pointing devices do not work if connected
to the keyboard connector.
2. The mouse or other pointing devices do not work if connected
to the mouse connector on the numeric keypad.
3. The computer keyboard does not work if an external
keyboard is connected to the 3550 Expansion Unit.
- Power-on all external devices.
- Power-on the 3550 Expansion Unit.
- Watch the screen for a power-on self test (POST) error code.
Write down all error codes that are displayed. (You can press
Pause when an error code occurs to hold the code on the screen.
Press F1 to continue.)
If the test stops and you cannot continue, go to 'Symptom-to-FRU Index'.
ARE THERE ANY EXTERNAL DEVICES ATTACHED TO THE EXPANSION UNIT?
+---+
Yes No-+004| Go to Step 007.
+-+-+ +---+
|005|
+---+
DID THE POWER-GOOD LIGHT FOR ALL OF THE EXTERNAL DEVICES COME ON ?
+---+
Yes No-+006| See the failing external device manual.
+-+-+ +---+
|007|
+---+
DID YOU RECEIVE A POST ERROR CODE ?
+---+
Yes No-+008| Go to Step 016.
+-+-+ +---+
|009|
+---+
IS THE FIRST POST ERROR CODE WITHIN THE RANGE OF 02080000 190I
TO 02470000 190I?
IMPORTANT: If your error code is not
in the range or if it is not followed by a 190I, answer NO
+---+
Yes No-+010| Go to Step 016.
+-+-+ +---+
|011|
+---+
- Restart the system program from:
° The system partition on the hard disk of the computer.
° The Reference Diskette or the backup copy of the system partition.
- Ensure that the Enable and Disable settings
are correct.
If you receive a warning on the screen concerning the 'Keep' and
'Remove' setting, follow the instructions on the
screen before continuing.
DID YOU HAVE TO CORRECT ANY OF THE ENABLE AND DISABLE SETTINGS ?
+---+
Yes No-+012| Go to 'Symptom-to-FRU Index'.
| +---+ Before replacing any SCSI device,
| check that there are no
+-+-+ duplicate SCSI ID settings.
|013|
+---+
- Restart the computer.
DO YOU STILL HAVE THE POST ERROR ?
+---+
Yes No-+014| To run system checkout, or if you suspect another
+-+-+ +---+ problem, go to Steo 016
|015|
+---+
Go to 'Symptom-to-FRU Index'.
-------------------------------------------------------------------------
+---+
|016|
+---+
- Set the volume control switch to maximum.
- Power-off, then power-on the 3550 Expansion Unit.
Closely watch the flashing cursor in the top-right corner of the
screen, press and hold Ctrl+Alt, then
press Insert. You must do this while the cursor is at the
top-right corner of the screen. Release the keys.
- Check for the following responses:
° One or two short beeps
° Readable instructions or the Main Menu
DID YOU RECEIVE BOTH RESPONSES ?
+---+
Yes No-+017| Go to the 'Symptom-to-FRU Index'.
| +---+ - or -
+-+-+ If the problem is not corrected,
|018| go to 'Undetermined Problem'.
+---+
- If you are not at the Main Menu, follow the instructions on the
screen to advance to the Main Menu.
- If you cannot advance to the Main Menu, go to 'Undetermined Problem'.
- Press Ctrl+A and run the system
checkout.
NOTE:
1. If the external keyboard has incorrect keyboard responses,
see
2. If the printer has incorrect printer responses,
see
3. If the image on the external
display is out of focus, jittering, rolling,
or has unreadable characters, see
IS THE LIST OF INSTALLED DEVICES CORRECT ?
+---+
Yes No-+019| Go to 'Checking the Installed Devices List'.
| +---+ If the problem is not corrected,
+-+-+ go to 'Undetermined Problem'.
|020|
+---+
- Run the advanced diagnostics tests.
DID THE TESTS IDENTIFY A FAILURE?
NOTE:
1. If the test stops and you cannot continue, replace the last device
being tested.
2. The following table describes the slot information displayed
on the screen.
This information is also displayed during the test of
the 3550 Expansion Unit when the test is successfully completed.
'n' can be any number.
| Slot Number | Identified Device |
|---|---|
| n | IBM 3550 Expansion Unit |
| n+1 | Built-in SCSI |
| n+2 | Upper slot |
| n+3 | Lower slot |
+---+
Yes No-+021| Go to Step 023
+-+-+ +---+
|022|
+---+
Follow the action described on the screen. If the problem is not
corrected, go to the 'Symptom-to-FRU Index'.
-------------------------------------------------------------------------
+---+
|023|
+---+
DID THE POST END WITHOUT AN ERROR ?
+---+
Yes No-+024| If you noticed an error symptom or if you
| +---+ received any POST error codes when the
| computer powered-on, go to 'Symptom-to-FRU Index'.
| - or -
| If the problem is not corrected,
+-+-+ go to 'Undetermined Problem'.
|025|
+---+
You may have an intermittent problem:
° Check for damaged cables or connectors.
° Reseat all adapters and devices in the 3550 Expansion Unit.
° Start an error log and run the tests several times.
° Check the power supply fan in the 3550 Expansion Unit and make sure
it is working properly.
° Check the power supply voltages (see 'Power Systems Checkout').
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.