26Diagnostic Beep CodesThe computer may emit a series of beeps during start-up if the display cannot showerrors or problems. These series of beeps, called beep codes, identify various problems.The delay between each beep is 300 ms, the delay between each set of beeps is 3seconds, and the beep sound lasts 300 ms. After each beep and each set of beeps, theBIOS should detect if the user presses the power button. If so, BIOS will jump out fromlooping and execute the normal shutdown process and power system.Code Cause and Troubleshooting Steps1 BIOS ROM checksum in progress or failureSystem board failure, covers BIOS corruption or ROM error2 No RAM detectedNo memory detected3 Chipset Error (North and South Bridge Chipset, DMA/IMR/Timer Error) , Time-Of-Day Clock test failure , Gate A20 failure ,Super I/O chip failure , Keyboard controller test failureSystem board failure4 RAM Read/Write failureMemory failure5 Real-time clock power failCMOS battery failure6 Video BIOS test failureVideo card failure7 Processor failureProcessor failure8 DisplayDisplay failure77
