Apple LATE 2009 manual M20, M02

3.	Remove the coin battery on	Yes	Issue resolved by logic board	M20
	the logic board, and leave out		reset. Measure DC voltage
	for approximately 1 minute.		on the battery touching the
	Then reinstall the battery. This		battery with the red probe,
	will reset the logic board. Does		and grounding with the black
	the computer startup properly		probe. If voltage is 2.7v or less,
	now?		replace the battery. See KBase
			article http://support.apple.
			com/kb/HT3250 for details
			on using a digital multi-meter.
		No	Go to step 4.
4.	Disconnect the drive carrier	Yes	Go to Step 5
	assembly and power on system.
	With video only connected to
	the board, is there a gray screen	No	Replace logic board..	M02
	with a flashing folder?
5.	Attempt to boot the system	Yes	Go to Step 6.
	with a known good Firewire
	boot drive. Does it boot?
		No	Replace the logic board.	M02
6.	Connect the interconnect	Yes	Go to step 7
	board to the logic board. Is
	there a gray boot screen with a
	flashing folder?	No	Replace the interconnect
			board.
7.	Remove the hard drives (one at	Yes	Go to step 8
	a time) from the internal frame
	assembly, install the internal
	frame. Does the system boot	No	If the optical drive in not
	(other drive may be an optical
			recognized, go to Optical
	drive or second hard drive)?
			Drive not recognized.
			If the other hard drive in not
			recognized, go to Hard Drive
			Not Recognized
8.	Install hard drive and optical	Yes	Possible connection issue.
	drive into the internal frame		Retest to verify.
	assembly, Does the system
	boot the Install DVD, and see
	the hard drive?	No	Go to Hard Drive Not
			Recognized.

2009-11-03 Mac mini (Late 2009) Symptom Charts — Startup and Power  21