FIC service manual Troubleshooting and Repair, FIC A360 Service Manual, 3 c BIOS Beep Codes

Troubleshooting and Repair

Table 6-3 (c) BIOS Beep Codes

Beep	Diagnostic	Description	Test Performed
Code	Code
3-3-4	2Bh	Screen memory test in	The video buffers (B0000h and B8000h)
		progress or failure.	are tested with a pattern test and a
			rolling ones test. Failure will result in a
			beep code but not a system halt.
3-4-1	2Ch	Screen initialization in	Until the video installation is confirmed,
		progress.	any calls to INT 10h Function 0 (set
			mode) will be prefaced with the
			diagnostic code. There is no expected
			failure from this.
3-4-2	2Dh	Screen retrace test in	Over a period of time, the retrace bit
		progress or failure.	(bit0) in the appropriate CRT controller
			status register (either port 3BAh or
			3DAh) is read and tested. The retrace bit
			should toggle from 0 to 1, then 1 to 0
			within the time period.
None	2Eh	Search for video ROM in	No specific test is performed by the
		progress.	system BIOS - just indicates that the
			BIOS is about to jump to the initialization
			code in the video option ROM.
none	30h	Screen running with video	No specific test is performed - just
		ROM.	indicates that a video option ROM was
			found and believed to be operating.
none	31h	Monochrome monitor	No specific test is performed - just
		operable.	indicates that the BIOS believes a
			monochrome monitor is installed and is
			operating.
none	32h	Color monitor (40-column)	No specific test is performed - just
		operable.	indicates that the BIOS believes a color
			monitor is installed and is operating. The
			mode has been set to 40-column as
			selected by the user in CMOS RAM.
none	33h	Color monitor (80-column)	No specific test is performed - just
		operable.	indicates that the BIOS believes a color
			monitor is installed and is operating. The
			mode has been set to 80-column as
			selected by the user in CMOS RAM.
4-2-1	34h	Timer-tick interrupt test in	All interrupts expect the timer-tick
		progress or failure.	interrupt are masked off at the interrupt
			controllers. If a timer-tick interrupt does
			not occur during a specific time period,
			an error message is displayed on the
			screen. The system does not halt.
4-2-2	35h	Shutdown test in progress or	A return address is stored in 40:67h and
		failure.	the processor is reset via the keyboard
			controller. If a timer tick occurs during
			this time period, an error message is
			displayed on the screen. Other failures
			are hard to detect. If possible, the BIOS
			will continue with POST, skipping the
			memory tests.

FIC A360 Service Manual 6-7