MiTAC 7521 PLUS/N 7521Plus / N N/B MAINTENANCE, Hard Drive Test Error, Parts, U24, Q24

7521Plus / N N/B MAINTENANCE

8.8 HARD DRIVE TEST ERROR

Either an error message is shown , or the driver motor continues spinning , while reading data is from or writing data is to hard drive.

HARD DRIVE TEST ERROR.

Check if HDD’s cable installed to HDD and system properly (J516)

YES

Re-boot

OK?

NO

1.Try another known good HDD.

2.Try another known good HDD’s Transulation cable.

YES

Re-boot

OK?

NO

Replace mother BD or into board-level Troubleshooting.

Correct it then end.

Replace the faulty parts then end.

Board-level

Troubleshooting for hard drive test error.

Check the following parts for cold solder or one of the following parts on the mother-board may be defective, use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement.

Parts:	Signals:
U24, Q24	PDD[0~15]	RDDP[0~15]
Q25, R210	PDDACK#	RPDDACK#
RP46, RP47	PDIOR#	RPDIOR#
RP45, RP58	PDIOW#	RPDIOW#
R191, R211	PDDREQ	RCS[1,3]P#
R212, JS10	PDCS[1,3]#	RDAP[0~2]
C253, C250	PDA[0:2]
J516	PIDEACTS#
	PIDE_ PU

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