pc on but no display

So this is my friend pc that he let me check to fix it, i tried every single thing that i thought can boot it up but none of them work. I tried change the ram that i have layiong around, i tried swab the gpu with mine, even the case because the first time he gave me the pc it wont turn on. Even...

Hi there everyone I am posting this thread for urgent help so a quick help will be very appreciated. My pc was just working normal before. One day like about a week ago a problem started to happen that was when I tried to turn on the pc no display was there but the fans and all were working...