Chapter 4
158
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.
1.
Power-off the computer.
2.
Visually check 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
•
Hard disk drive
•
DIMM
•
CD-ROM/Diskette drive Module
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 Issue is still not resolved, see “Online Support Information” on page 184.
Summary of Contents for ZX4800 Series
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Page 10: ...X Table of Contents Laptopblue ...
Page 47: ...Chapter 2 37 Laptopblue ...
Page 53: ...43 Chapter 3 4 Lift the ODD bezel away 5 Close the ODD assembly Laptopblue ...
Page 57: ...47 Chapter 3 5 Forcefully pry the rear cover from the assembly i ii iii iv Laptopblue ...
Page 59: ...49 Chapter 3 4 Disconnect the audio cable from the audio board Laptopblue ...
Page 62: ...Chapter 3 52 7 Remove the HDD module from the bracket Laptopblue ...
Page 74: ...Chapter 3 64 15 Lift the mainboard shielding away from the chassis Laptopblue ...
Page 76: ...Chapter 3 66 4 Lift the WLAN module away Laptopblue ...
Page 82: ...Chapter 3 72 4 Remove the fan Laptopblue ...
Page 87: ...77 Chapter 3 4 Remove the cables from the guide clips Laptopblue ...
Page 97: ...87 Chapter 3 4 Lift the power board away from the bezel Laptopblue ...
Page 100: ...Chapter 3 90 4 Disconnect the webcam cable Laptopblue ...
Page 121: ...111 Chapter 3 13 Connect the LVDS cable 14 Adhere the LVDC cable protective cover Laptopblue ...
Page 138: ...Chapter 3 128 4 Connect the left and right touchscreen sensor cable connectors Laptopblue ...
Page 143: ...133 Chapter 3 4 Connect the two 2 LCD to inverter board cables 1 and 2 1 2 Laptopblue ...
Page 155: ...145 Chapter 3 4 Close the ODD Laptopblue ...
Page 193: ...183 Appendix B Laptopblue ...
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