Laptop User Manual
2
7521
7521
Plus / N N/B MAINTENANCE
Plus / N N/B MAINTENANCE
CONTENTS
CONTENTS
6.
6.
System Block Diagram
System Block Diagram
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7. Maintenance Diagnostic
7. Maintenance Diagnostic
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7.1 Introduction -----------------------------------------------------------------------------------------------------------------------------
7
7.2 Error Codes -----------------------------------------------------------------------------------------------------------------------------
7.3 Diagnostic Tools ------------------------------------------------------------------------------------------------------------------------
8. Trouble Shooting
8. Trouble Shooting
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8.1 No Power ---------------------------------------------------------------------------------------------------------------------------------
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8.2 No Display -------------------------------------------------------------------------------------------------------------------------------
8.3 VGA Controller Failure LCD No Display ----------------------------------------------------------------------------------------
8.4 External Monitor No Display --------------------------------------------------------------------------------------------------------
8.5 Memory Test Error --------------------------------------------------------------------------------------------------------------------
8.6 Keyboard ( K/B ) , Touch-Pad ( T/P ) , ESB Test Error -----------------------------------------------------------------------
8.7 CD-ROM Drive Test Error ----------------------------------------------------------------------------------------------------------
8
8.8 Hard Drive Test Error ----------------------------------------------------------------------------------------------------------------
8.9 USB Port Test Error ------------------------------------------------------------------------------------------------------------------
8.10 Audio Failure --------------------------------------------------------------------------------------------------------------------------
8.11 SIO Port Test Error ------------------------------------------------------------------------------------------------------------------
8.12 PIO Port Test Error -----------------------------------------------------------------------------------------------------------------
8.13 PC CARD Socket Failure -----------------------------------------------------------------------------------------------------------
9. Spare Parts List
9. Spare Parts List
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10. System Explode View
10. System Explode View
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11. 7521 Plus/N Schematics ----------------------------------------------------------------------------------------------
12. Reference
12. Reference
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