MiTAC 7521 PLUS/N 7521Plus / N N/B MAINTENANCE, Contents, 11. 7521 Plus/N Schematics

	7521Plus / N N/B MAINTENANCE
CONTENTS
6. System Block Diagram --------------------------------------------------------------------------------------------------------------------------		97
7. Maintenance Diagnostic ------------------------------------------------------------------------------------------------------------------------		98
7.1	Introduction -----------------------------------------------------------------------------------------------------------------------------	98
7.2	Error Codes -----------------------------------------------------------------------------------------------------------------------------	99
7.3	Diagnostic Tools ------------------------------------------------------------------------------------------------------------------------	101
		102
8. Trouble Shooting ---------------------------------------------------------------------------------------------------------------------------------
8.1 No Power ---------------------------------------------------------------------------------------------------------------------------------		103
8.2	No Display -------------------------------------------------------------------------------------------------------------------------------	108
8.3	VGA Controller Failure LCD No Display ----------------------------------------------------------------------------------------	111
8.4	External Monitor No Display --------------------------------------------------------------------------------------------------------	113
8.5	Memory Test Error --------------------------------------------------------------------------------------------------------------------	115
8.6	Keyboard ( K/B ) , Touch-Pad ( T/P ) , ESB Test Error -----------------------------------------------------------------------	117
8.7	CD-ROM Drive Test Error ----------------------------------------------------------------------------------------------------------	119
8.8	Hard Drive Test Error ----------------------------------------------------------------------------------------------------------------	121
8.9	USB Port Test Error ------------------------------------------------------------------------------------------------------------------	123
8.10 Audio Failure --------------------------------------------------------------------------------------------------------------------------		125
8.11 SIO Port Test Error ------------------------------------------------------------------------------------------------------------------		128
8.12 PIO Port Test Error -----------------------------------------------------------------------------------------------------------------		130
8.13 PC CARD Socket Failure -----------------------------------------------------------------------------------------------------------		132
9. Spare Parts List -----------------------------------------------------------------------------------------------------------------------------------		134
10. System Explode View --------------------------------------------------------------------------------------------------------------------------		143
11. 7521 Plus/N Schematics ----------------------------------------------------------------------------------------------		145
12. Reference -----------------------------------------------------------------------------------------------------------------------------------------		180

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