Question PC automatically starts up when plugged in, and monitor has no signal ?

Oct 11, 2020
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My PC automatically starts up when plugged in, and monitor has no signal ?
I've tried to replace rams and cmos [battery] but not working.
Is there is any hope ?
 
Oct 11, 2020
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Actually this pc is used, Fujitsu computer case , I didn't have any clear start with this computer yet..
this computer case is Fujitsu ESPRIMO P557/E85+ Modell MI6W
Core i3 processor and 8gb ram
I can't recognise motherboard Modell but it's written on it Fujitsu designed and assembled in Europe .
I got it from a friend who didn't use it since longtime and he just gave it to me because he don't need it, btw it's without graphic card, and my monitor is Samsung Modell 2053BW
I've bought dvi-d cable for both sides to connect this pc with the monitor, but it didn't work as well .
 
Oct 11, 2020
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How can I reset the bios ?
I don't have any visuals for any processes happening in computer because it's always showing no signal on my monitor. Or there is other way ?