Phillip Corcoran :
There's a very strong likelihood of ESD damage, but more importantly from a personal safety point of view there's also a risk of a live-short and/or electric shock.
Get the power button fixed, you can't go on powering it up like that!
The risks that some people take for want of a relatively cheap fix is unbelievable.
thank you for your response
I search about identical new spare power button for my case but unfortunately I did not find. however, there are motherboards that allow you to turn on the computer from the PS/2 port keyboard but unfortunately I did not find any similar choice in my bios, so I have two question in regard:
1. can I update my bios to version that can turn of the pc from the bios or that not included in bios updates?
2.what do you think about connecting the screw or screw driver buy a single wire and plug it to the earthing/grounding hole in the outlet to avoid the Electrostatics demage to the motherboard when turning the pc on screw or screw driver?