Hello Tom's hardware, my pc was freezing a lot so I decided to clean it up. I removed the cpu and video card and cleaned them from a lot of dust. After I put the parts back, it would start for a second and then stop... I saw my cpu paste was dried out so I reapplied a new one. So now it starts and doesn't turn off BUT I hear these annoying beeps and there's no image on my monitor. I googled the beeps code and I thought it's a video card problem so I opened it up and saw that it's paste has also dried out and reapplied a new one. I thought this would fix the problem but the beeping is still there and again there is no image on my screen..
I've tried disconnecting and reconnecting the other parts, clearing the cmos too,I've rechecked all the connections and tried to boot it without the video card but it's still the same problem. My question is how can I fix it and what to do next? (to locate the problem)