Acer RL100 Acer Revo L100 Desktop Service Guide - Page 60

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 One short beep Continuous one long beep One long beep and two short beeps then repeat. One long beep then one short beep Two short beeps Cause and Description System is OK. Something is wrong with the memory installed. Note that there could also be something wrong with just accessing the memory (ie the motherboard has a problem). The motherboard is not able to access the video card for some reasons. Either the video card is not working, its memory is not accessible, or its BIOS may be corrupt. This error code could also mean something is wrong with the motherboard. BIOS damaged. Processor jump to BootBlock to execute the default procedure. CMOS checksum error. 52 Chapter 4