BIOS Familiarization for Computer Hardware Servicing NC II Students (BASIC)

              The read-only memory BIOS provides a intrinsic  Setup program that permits the user to change the fundamental system configuration and hardware parameters, Bios may be a set of routines that affects however  transfer information between computer parts, like memory, disk, and also the display adaptor. The changed information are going to be hold on in an exceedingly battery-backed CMOS, in order that the info are going to be preserved even once the ability is turned-off. In general, the knowledge saved within the CMOS RAM can keep unchanged unless there's a configuration amendment within the system, like disc drive replacement or a tool is side. During this model we tend to are mistreatment recent form of BIOS version, appearance can disagree on some Machine model particularly for the newer models.

Familiarizing The Beep Codes according to types of BIOS for Computer Hardware Servicing NCII Course

AMI BIOS Beep Codes:

Beeps	Error Message	Description
1 short	DRAM refresh failure	The programmable interrupt timer or programmable interrupt controller has probably failed
2 short	Memory parity error	A memory parity error has occurred in the first 64K of RAM.  The RAM IC is probably bad
3 short	Base 64K memory failure	A memory failure has occurred in the first 64K of RAM.  The RAM IC is probably bad
4 short	System timer failure	The system clock/timer IC has failed or there is a memory error in the first bank of memory
5 short	Processor error	The system CPU has failed
6 short	Gate A20 failure	The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller
7 short	Virtual mode processor exception error	The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry
8 short	Display memory read/write error	The system video adapter is missing or defective
9 short	ROM checksum error	The contents of the system BIOS ROM does not match the expected checksum value.  The BIOS ROM is probably defective and should be replaced
10 short	CMOS shutdown register read/write error	The shutdown for the CMOS has failed
11 short	Cache error	The L2 cache is faulty
1 long, 2 short	Failure in video system	An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered
1 long, 3 short	Memory test failure	A fault has been detected in memory above 64KB
1 long, 8 short	Display test failure	The video adapter is either missing or defective
2 short	POST Failure	One of the hardware testa have failed
1 long	POST has passed all tests