求翻译：故障现象：HP 商用机开机出现6短报警声音，并出现错误提示：912-the computer has been removed,the machine cover has been removed since last system start up.please ensure hat any system access was authorized是什么意思？

Fault phenomenon: hp commercial machine boot six short alarm sound, and the emergence of the computer error :912-has been removed, the machine cover has been removed since last system start up.please ensure hat any system access was authorized

Symptoms: HP Business Phone is switched on The 6 short alarm sound, and an error message appears: 912 - The computer has been removed, the machine cover has been removed since last system start up any hat, please ensure system access was authorized

Breakdown phenomenon: The HP mercantile aeroplane starting appears 6 to report to the police short the sound, and appears the wrong prompt: 912-the computer has been removed, the machine cover has been removed since last system start up.please ensure hat any system access was authorized

Symptom: 6 HP commercial power on appear short alarm sounds, and the error message appears: 912-the computer has been removed,the machine cover has been removed since last system start up.Please ensure hat any system access was authorized

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