The frequency of the CPU is turned to 1GHz after the power-on self-test

Symptom: A CPU for the Intel Celeron 2.0GHz of the computer, the previous one really used normally, the most recent post on the self-test when the frequency of the CPU turned to the L GHz, and "Defaults CMOS Setup Loaded" prompted information; After entering the CMOS set of CPU parameters, the system normally shows the frequency of the 2.0 GHz, but after a period of time, there are more failures.

Failure analysis and elimination: According to the analysis of the fault, because the computer display "Defaults CMOS Setup Loaded" Prompts the information generally indicates that the battery is not electricity, so first replace the CMOS battery, and then detect, found that the failure disappeared, it seems that the battery is not caused by the frequency of the low fault.