宏基电脑问题每次开机都提示 Warning! Your chassis has been opened! 必须按F1才能进入

这是屏幕显示的字：
Press Del to run Setup
Press F12 for BBS POPUP
Memory Clock : 667 MHz,Tcl:5 Trcd:4 Trp:4 Tref:7.8uS
(2T Timing) 64 bit

Auto-Detecting 3rd Master..IDE Hard Disk
Auti-Detecting 3rd Slave...ATAPI CDROM
3rd Master: ST3160815AS 4.AAA
Ultra DMA Mode-6, S.M.A.R.T. Capable and Status OK
3rd Slave : HL-DT-STDVD-ROM DH10N 0A01
Ultra DMA Mode-5
Auto-detecting USB Mass Storage Devices ..
00 USB mass storage devices found and configured.

Warning! Your chassis has been opened!
软驱已经关了，chassis warning 也已经调为 disable 了！
可是还是出现这种情况

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意思是：警告，你的底盘已经打开了，你是不是动过机子盖

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机箱被打开了，机箱入侵报警
检查机箱。。。。

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