Lenovo ThinkCentre A50p (English, Dutch, French, German, Italian) Quick refere - Page 46

Code 1762 1962 5962 8603 Description A change in configuration occurred. Action A hard disk drive has been added or removed. v Restore the original hardware. Or v Accept the new configuration using the IBM Setup Utility. No operating system found or no device in the startup sequence has a valid boot record. A change in configuration occurred. If you cannot correct the problem, have the computer serviced. Change the startup sequence using the IBM Setup Utility. If you cannot correct the problem, have the computer serviced. An ATAPI device has been added or removed. v Restore the original hardware. Or v Accept the new configuration using the IBM Setup Utility. Pointing device error No mouse was detected. If you cannot correct the problem, have the computer serviced. v Install a mouse. Or v Set the mouse option correctly using the IBM Setup Utility. If you cannot correct the problem, have the computer serviced. POST beep codes Another way for POST to notify you of errors is through a series of audible beeps. A beep pattern represents a numeric value and provides further information about the location of a potential problem. The following are the most common POST beep codes that you might hear when starting your computer. 20 Quick Reference