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Chapter 4
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 On
Issue” on page 122.):
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
Содержание Aspire Z5751
Страница 6: ...VI ...
Страница 10: ...X Table of Contents ...
Страница 14: ...4 Chapter 1 System Block Diagram ...
Страница 34: ...24 Chapter 1 ...
Страница 72: ...62 Chapter 3 4 Disconnect the following four cables from the Mainboard A B C D ...
Страница 85: ...Chapter 3 75 4 Using both hands lift the Thermal Module clear of the Mainboard ...
Страница 87: ...Chapter 3 77 4 Lift the CPU Fan clear of the Mainboard as shown ...
Страница 93: ...Chapter 3 83 5 Lift the LCD Panel clear of the module ...
Страница 101: ...Chapter 3 91 9 The Antennas and cables appear as shown when correctly installed ...
Страница 106: ...96 Chapter 3 2 Replace the four screws and screw caps provided ...
Страница 111: ...Chapter 3 101 5 Replace the FFC and press down as indicated to secure it to the Upper Cover ...
Страница 115: ...Chapter 3 105 2 Press down around the edges to secure it in place 3 Replace the nine screws in the Upper Cover as shown ...
Страница 116: ...106 Chapter 3 4 Replace the three screw caps as shown 5 Connect the following cables to the Mainboard A B C D ...
Страница 122: ...112 Chapter 3 17 Replace the two screws securing the LCD Module to the Lower Cover ...
Страница 130: ...120 Chapter 3 ...
Страница 154: ...144 Chapter 5 ...
Страница 156: ...146 Chapter 6 Aspire 5517 Exploded Diagrams Main Assembly 1 2 3 4 5 ...
Страница 169: ...Chapter 6 159 ...
Страница 178: ...168 Appendix C ...
Страница 182: ...172 ...