Toshiba Satellite Pro U400 Series, Maintenance Manual

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Chapter2 Troubleshooting Procedures
2-14 Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Procedure 1 Message Check
When the power is turned on, the system performs the Power On Self Test (POST) installed
in the BIOS ROM. The POST 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 MS-DOS or Windows XP is properly loaded, go to Procedure 4.
Check 1 If one of the following error messages is displayed on the screen, press the
F1
key
as 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 SETUP screen appears 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 ......
Check 2 If the following error message is displayed on the screen, press any key as the
message instructs.
The following error message appears when data stored in RAM under the resume
function is lost because the battery has become discharged or the system board is
damaged. Go to Procedure 3.
WARNING: RESUME FAILURE.
PRESS ANY KEY TO CONTINUE.
If any other error message displays, perform Check 3.