Procedure 1 Message Check - Toshiba T4500 User Manual

2.4 System PCB Troubleshooting
This section describes how to determine if the system board is defective or not functioning prop-
erly. Start with Procedure 1 and continue with the other procedures as instructed. The procedures
described in this section are:
Procedure 1: Message Check
Procedure 2: Printer Port LED Check
Procedure 3: Diagnostic Test Program Execution Check
Procedure 4: System PCB Replacement Check
Procedure 1 Message Check
When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the
BIOS ROM. The IRT tests each IC on the system board and initializes it.
If an error message is shown on the display, perform Check 1.
If there is no error message, go to Procedure 2.
If the Toshiba MS-DOS is properly loaded, go to Procedure 3.
If one of the following error messages is displayed on the screen, press the F1 key as
Check 1:
the message instructs. These errors occur when the system configuration preserved in
the RTC memory (CMOS type memory) is not the same as the actual configuration or
when the data is lost.
If you press the F1 key as the message instructs, the system configuration in the RTC
memory configuration is set to the default setting. If error message (b) appears often
when the power is turned on, replace the RTC battery. If any other error message is
displayed, perform Check 2.
(a)
*** Error in CMOS.
Check system.
(b)
*** Error in CMOS.
Check system.
(c)
*** Error in CMOS.
Check system.
(d)
*** Error in CMOS.
Check system.
(e)
*** Error in CMOS.
Check system.
2-10
Bad HDD type ***
Then press [F1] key ......
Bad battery ***
Then press [F1] key ......
Bad check sum ***
Then press [F1] key ......
Bad memory configuration ***
Then press [F1] key ......
Bad time function ***
Then press [F1] key ......