black screen

Re: black screen

i took it to a technician and they cant seem to figure out what could be causing this. first they said it could be virus, after i told them i did a format AFTER the problem started but it didnt get fixed they said it could be motherboard... anyway..
I was just thinking.. i use linksys router and notebook adapter. could it be possible that the adapter may be causing this? just want to make sure before i get a new computer.