Matsushita CF-18NHHZXBM service manual Error Messages and Troubleshooting

5.5. Error Messages and Troubleshooting

The table below explains the parts that may be faulty or damaged should an error message occur while performing the various test items of the self diagnostics program.

	Test classification	Screen display test items	Contents
1	CPU	A20 GATE TEST	Address 20 line
2	(CPU related)	CACHE ON/OFF	Cache memory on/off
3		NPU OPERAND TEST	Floating point processor function
4	RAM (Memory related)	RAM STANDARD	Memory standard
5	CONTROL	DMA PAGE REG TEST	DMA page register
6	(Control ICs on the	DMA REGISTER TEST	DAM register
7	main board, etc.)	DMAC Transfer TEST	DAM transfer test
8		PIC HALT INSTRUCTION TEST	Interrupt controller
9		PIC REGISTER TEST	Interrupt controller
10		RTC CMOS RAM TEST	Real time clock CMOS
11
12		SPEAKER TEST	Speaker
13		PIT CH0 TEST	Interrupt timer CH0
14		PIT CH1 TEST	Interrupt timer CH1
15		PIT CH2 TEST	Interrupt timer CH2
16	IO	KEYBOARD REG TEST	Keyboard
17	(Input-output)	PS/2 MOUSE REG	Mouse
18	COMMUNICATION	SERIAL WRAP TEST	Serial loop back (jig required)
19		SERIAL ALL INTERNAL TEST	Serial port
20		PARALLEL REGISTER R/W	Parallel register
21	AUX	PCIC ALL TEST	PCIC
	(Auxiliary functions)	Card Bus REG	Card Bus port
		USB REG	USB port
22	VIDEO	VGA ALL TEST	VGA
23	(Display related)	SVGA RAM TEST	SVGA RAM
24		VESA MODE TEST	VESA mode
25	DISK	FD WT/RD/WP TEST	FD write/read/write protection
26	(FDD, HDD)	HDD ALL TEST	Only HDD lead selected
27	UNIQUE	ECP REGISTER R/W	Parallel port
28	(Individual functions)	EPP REGISTER R/W	Parallel port
29		EXT. CMOS R/W TEST	Extension CMOS R/W test

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