Toshiba T6400, Maintenance Manual

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2-13
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 displayed, perform Check 1. If not, go to Procedure 2. If Toshiba MS-DOS
is properly loaded, go to Procedure 3.
Check 1 If the following error message is displayed on the screen for one second, the external
FDD is not connected, even though the external FDD/PRT option in the SETUP
program is set to FDD A.
Set the external FDD/PRT option to FDD B or PRT, or connect the external FDD and
restart the system. If any other error message appears, execute Check 2.
*** FDD A is not installed ***
Check 2 If one of the following error messages is displayed on the screen, press any key as the
message instructs.
These errors occur when the system configuration stored in the RTC memory (CMOS
type memory) is not the same as the actual one or the data is lost.
If you press any 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 3.
(a)
*** Error in CMOS. Bad HDD type ***
Check system. Then press any key ......
(b)
*** Error in CMOS. Bad battery ***
Check system. Then press any key ......
(c)
*** Error in CMOS. Bad check sum ***
Check system. Then press any key ......
(d)
*** Error in CMOS. Bad memory configuration ***
Check system. Then press any key ......
(e)
*** Error in CMOS. Bad time function ***
Check system. Then press any key ......