Acer Veriton Z2610G Acer Veriton Z2610G and Z2621G Desktop Service Guide - Page 84

System Internal Inspection 1. Turn off the system and all the peripherals connected to it. 2. Unplug the power cord from the power outlets. 3. Unplug the power cord from the system. 4. Unplug all peripheral cables from the system. 5. Place the system unit on a flat, stable surface. 6. Remove the system covers.For instructions on removing system covers, refer to "System Disassembly". 7. Verify that components are properly seated. 8. Verify that all cable connectors inside the system are firmly and correctly attached to their appropriate connectors. 9. Verify that all components are Acer-qualified and supported. 10. Replace the system covers. 11. Power on the system. 12. If the problem with the system is not evident, you can try viewing the POST messages and BIOS event logs during the system startup.If the cause of the failure is still can not be determined, review the POST messages and BIOS checkpoints during the system startup. 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 ready. System is OK. Memory not installed or memory error. VGA not installed or VGA error. Graphics card error/not installed, graphics card memory error or graphics card BIOS checksum error. BIOS damaged. BIOS is damaged, BIOS POST jumps to Boot Block to execute the default procedures. CMOS damaged. CMOS checksum error or CMOS battery loss occurs. Checkpoints A checkpoint is either a byte or word value output to I/O port 80h.The BIOS outputs checkpoints throughout bootblock and Power-On Self Test (POST) to indicate the task the system is currently executing. Checkpoint sare very useful in aiding software developers or technicians in debugging problems that occur during the preboot process. Viewing BIOS checkpoints 76 Veriton Z2610G/Z2611G/Z2620G/Z2621G AIO Computer Service Guide