![background image](http://html1.mh-extra.com/html/viewsonic/va912-4/va912-4_service-manual_1020986047.webp)
2.2 Security file is a key to use ISP function , press “ OK “ button , see Fig 2.2
Fig. 2.2
2.3 The warning is used to remind user of that different CPU rate may cause ISP function fail. (it’s limited by IIC
protocol ) , press “ OK “ button , see Fig 2.3
Fig. 2.3
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