Lenovo ThinkCentre A50p (English, Dutch, French, German, Italian) Quick refere - Page 47

Beep pattern Description Action 1 long and 2 short beeps No on-screen message. Beeps Remove and reinstall the dual occur before video inline memory modules initialization. (DIMMs). If the problem persists, have the computer serviced. 1 long beep followed External ROM failure (such as by a series of short VGA) beeps If the problem persists, have the computer serviced. 2 short beeps A POST error occurred. If you have changed the hardware configuration, go into the IBM Setup Utility and exit to save setting. Otherwise refer to error code section to resolve error. 1 short - 3 short - 3 No memory or no short - 1 short configuration memory Reinstall the memory. If problem persists, replace the memory. 4 sets of 4 short beeps POV tamper; POV binding Make sure the original POV card information does not match. is properly in its socket. Here are some general guidelines for working with POST beep codes: v Record any beep patterns that you hear. If you call for service, you will be asked for the beep patterns. v If the beep pattern is not in this book, more in-depth troubleshooting is required. - If the operating system starts when you turn on your computer, use Access IBM to learn how to run IBM Enhanced Diagnostics and see the entire online troubleshooting procedures. - If the operating system will not start, have the computer serviced. Chapter 4. Troubleshooting and diagnostics 21