Chapter 4
92
Beep Codes
Beep codes are used by the BIOS to indicate a serious or fatal error to the end user. Beep codes are used
when an error occurs before the system video has been initialized. Beep codes will be generated by the
system board speaker, commonly referred to as the PC speaker.
AMIBIOS displays the checkpoints in the bottom right corner of the screen during POST. This display method
is limited, since it only displays checkpoints that occur after the video card has been activated.
Not all computers using AMIBIOS enable this feature. In most cases, a checkpoint card is the best tool for
viewing AMIBIOS checkpoints.
Beep Symptom
Cause and Description
One short beep
System is ready.
System is OK.
Continuous one long beep
Memory not installed or memory error.
One long beep and two short beeps then
repeat.
VGA not installed or VGA error.
Graphics card error/not installed, graphics card memory
error or graphics card BIOS checksum error.
One long beep then two short beep
BIOS damaged.
BIOS is damaged, BIOS POST jumps to Boot Block to
execute the default procedures.
Two short beeps
CMOS damaged.
CMOS checksum error or CMOS battery loss occurs.
Summary of Contents for Aspire M3420
Page 1: ...Acer Aspire M3420 Service Guide SG V1 00 PRINTED IN TAIWAN ...
Page 13: ...Chapter 1 5 Block Diagram ...
Page 59: ...Chapter 3 51 3 Lift the board from the chassis 4 Punching in IO Shield then you can remove it ...
Page 63: ...Chapter 3 55 5 Pull the power switch and LED cable from chassis hole ...
Page 75: ...Chapter 3 67 Reinstalling the I O Shielding 1 Install I O shielding into chassis ...
Page 105: ...97 Chapter 4 b Select Proceed with flash update and Press Enter ...
Page 107: ...Chapter 5 99 M B Placement Jumper and Connector Information Chapter 5 ...
