Toshiba 730CDT Maintenance Manual page 36

2.4 System Board/PCB Troubleshooting
This section describes how to determine if the system board or other PCBs are defective or
not functioning properly. Start with Procedure 1 and continue with other procedures as
instructed. The procedures described in this section include:
Procedure 1:
Procedure 2:
Procedure 3:
Procedure 4:
Procedure 5:
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 Toshiba MS-DOS or Toshiba Windows 95 is properly loaded, go to
Procedure 3.
Check 1 If any one of the following error messages display, press the F1 key (as the mes-
sage instructs). These errors occur when the system configuration preserved in
the RTC memory (CMOS type memory) is not the same as the actual configura-
tion or when the data is lost.
If you press the F1 key, the TSETUP screen appears allowing you to set the
system configuration. 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)
Check system.
(b)
Check system.
(c)
Check system.
(d)
Check system.
(e)
Check system.
(f)
Check system.
(g)
Check system.
2-12
Message Check
Printer Port LED Check on Boot Mode
Printer Port LED Check on Resume Mode
Diagnostic Test Program Execution Check
Replacement Check
*** Bad HDD type ***
Then press [F1] key ......
*** Bad RTC battery ***
Then press [F1] key ......
*** Bad configuration ***
Then press [F1] key ......
*** Bad memory size ***
Then press [F1] key ......
*** Bad time function ***
Then press [F1] key ......
*** Bad check sum (CMOS) ***
Then press [F1] key ......
*** Bad check sum (ROM) ***
Then press [F1] key ......
730CDT