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104
Chapter 4
NOTE:
If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined
Problems” on page 104.
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.
Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.
If no error is detected, do not replace any FRU.
3.
If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect,
whether a short circuit is suspected, or whether the system is inoperative.
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE:
Verify that all attached devices are supported by the computer.
NOTE:
Verify that the power supply being used at the time of the failure is operating correctly. (See “Power
System Check” on page 91.):
1.
Power-off the computer.
2.
Visually check them for damage. If any problems are found, replace the FRU.
3.
Remove or disconnect all of the following devices:
•
Non-Acer devices
•
Printer, mouse, and other external devices
•
Battery pack
•
Hard disk drive
•
DIMM
•
CD-ROM/Diskette drive Module
•
PC Cards
4.
Power-on the computer.
5.
Determine if the problem has changed.
6.
If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.
If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
•
System board
•
LCD assembly
Modem-Related Symptoms
Symptom / Error
Action in Sequence
Internal modem does not work correctly.
Modem phone port
modem combo board
System board
Содержание Aspire 7740 Series
Страница 6: ...VI ...
Страница 12: ...4 Chapter 1 System Block Diagram ...
Страница 30: ...22 Chapter 1 ...
Страница 42: ...34 Chapter 2 ...
Страница 53: ...Chapter 3 47 4 Remove the DIMM module s ...
Страница 58: ...52 Chapter 3 NOTE When installing the CPU make sure to install the CPU with Pin 1 at the corner as shown ...
Страница 60: ...54 Chapter 3 3 Release the keyboard from the latches and turn it over on the palmrest area ...
Страница 75: ...Chapter 3 69 15 Remove the USB board module from the lower case ...
Страница 89: ...Chapter 3 83 10 Remove the LCD panel with brackets from the back cover ...
Страница 118: ...112 Chapter 5 ...
Страница 120: ...114 Chapter 6 Exploded Diagram ...
Страница 130: ...124 Chapter 6 ...
Страница 131: ...Appendix A 125 Model Definition and Configuration Appendix A ...
Страница 156: ...150 Appendix B ...
Страница 158: ...152 Appendix C ...