Help. I bought an old compaq deskpro which has worked well for what I wanted, but now I neeed to change the graphics card and I can't open the case. It looks as though I might need to remove the front, there are two little semi-cicles to depress, but nothing moves and I don't want to pull too hard!
Yep it's the 2 little semi-circles that lock the case. I had something similar some time ago and as I remember it you need to depress both buttons and slide the top backwards - but it's not very user friendly ;-)