2-12
710CDT/720CDT
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:
Message Check
Procedure 2:
Printer Port LED Check on Boot Mode
Procedure 3:
Printer Port LED Check on Resume Mode
Procedure 4:
Diagnostic Test Program Execution Check
Procedure 5:
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 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 configuration 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)
*** Bad HDD type ***
Check system. Then press [F1] key ......
(b)
*** Bad RTC battery ***
Check system. Then press [F1] key ......
(c)
*** Bad configuration ***
Check system. Then press [F1] key ......
(d)
*** Bad memory size ***
Check system. Then press [F1] key ......
(e)
*** Bad time function ***
Check system. Then press [F1] key ......
(f)
*** Bad check sum (CMOS) ***
Check system. Then press [F1] key ......
(g)
*** Bad check sum (ROM) ***
Check system. Then press [F1] key ......
Summary of Contents for Tecra 710CDT
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Page 207: ...C 16 710CDT 720CDT ...
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