IBM SelectaDock II, Hardware Maintenance Manual

Page: 22 / 67

PC Test Card LED:
The green LED on the PC test
card lights when the PCMCIA test is running. If the LED
does not light, check that the card is installed correctly by
reseating the card. If it still does not light after reseating,
try using another slot for the test. If the LED still does not
light and the test fails, replace the FRU shown in the
diagnostic error code.
Errors during the POST:
If the POST detects an
error, a three- to eight-digit error code displays.
Memory Errors:
If the POST detects a memory error
in the first 640 KB of system memory, all the first bank
memory is deallocated and the test continues with the
second 640 KB of memory. If the total amount of
error-free memory becomes less than 2 MB, a 2XX POST
error occurs and the system stops. All the remaining
memory is used as system memory. When the POST
memory test has completed, the usable memory size is
compared with the configuration data. If a mismatch is
detected, a 2XX error code occurs. Press Esc, and F1
after restart to continue system operation.
Memory sizes, that are deallocated because of the POST
process, are kept by the hibernation or suspend functions.
To test this memory, it must be reconfigured as part of the
original memory size. Configure by turning the power off
and on.
Deallocation support is done only by the POST for memory
errors. All irrecoverable memory errors that occur during
normal operation cause an interrupt to the operating
system.
Diagnostics for the SelectaDock
Docking System
The SelectaDock Docking System Options Diskette helps
you troubleshoot the expansion unit, SCSI adapter, and
SCSI device problems through a series of menus.
Run the diagnostics to verify operation of the SelectaDock
Docking System and SCSI devices. Do the following:
1. Power-off the computer on the SelectaDock Docking
System and external SCSI devices.
2. Insert the Option Diskette into drive A.
3. Power-on all attached external SCSI devices and the
computer on the SelectaDock Docking System.
4. The Logo Screen appears.
5. After a few seconds the Main Menu appears.
6. Select a device for testing and go to the respective
section.
13