I tried to upgrade my RAM memory, but when I opened the computer and tried to put them in I realized that I have ddr2, and I bought ddr3. Well, nvm, I will exchange them, but here is the problem. When I put my old memory back into my computer and tied to turn it on, I just hear strange beeps and nothing is happening on the screen.
What I tried so far: changing my 2 old RAM sticks over every slot; unplug all power and wires and try again; unplug all power and wires and remove RAM and remove battery from motherboard for a few minutes and pressing power button few times and than put back battery and try again; I blow the dust from RAM sticks and from motherboard; and I checked if my motherboard is burned. I also tried to put sticks inside by pressing left side first and than right one,and opposite, and pressing in a same time both sides.
I don't know what else to do.