168
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 152.):
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
Summary of Contents for Aspire 4930 Series
Page 6: ...VI ...
Page 10: ...X Table of Contents ...
Page 14: ...4 Chapter 1 System Block Diagram ...
Page 48: ...38 Chapter 1 ...
Page 63: ...Chapter 2 53 ...
Page 65: ...Chapter 2 55 ...
Page 66: ...56 Chapter 2 ...
Page 74: ...64 Chapter 3 6 Remove the HDD cover as shown 7 Remove the WLAN cover as shown ...
Page 79: ...Chapter 3 69 5 Remove the HDD from the carrier ...
Page 88: ...78 Chapter 3 Removing the Antenna 1 Remove the Antenna Cables from the securing pins as shown ...
Page 91: ...Chapter 3 81 6 Place the antenna cable as shown to avoid damaging them ...
Page 102: ...92 Chapter 3 13 Remove the Finger Print Reader board from the Upper Cover ...
Page 104: ...94 Chapter 3 13 Remove the Launch Board from the Upper Cover ...
Page 119: ...Chapter 3 109 18 Disconnect the DC IN Cable from the Mainboard ...
Page 121: ...Chapter 3 111 14 Lift the Thermal Module clear of the Mainboard ...
Page 123: ...Chapter 3 113 15 Lift the CPU clear of the Mainboard ...
Page 127: ...Chapter 3 117 14 Remove the HDMI Module as shown ...
Page 130: ...120 Chapter 3 10 Lift up the bezel rightside first and remove it from the LCD Module ...
Page 134: ...124 Chapter 3 11 Lift the Camera Module clear of the LCD Module ...
Page 138: ...128 Chapter 3 12 Remove the LCD brackets by pulling away from the LCD Panel as shown ...
Page 160: ...150 Chapter 3 ...
Page 191: ...Chapter 6 181 ...
Page 214: ...Appendix A 204 ...
Page 218: ...208 Appendix B ...
Page 220: ...210 Appendix C ...