Well I took the PC to repair and they told me that the processor was not receiving enough energy, apparently I moved something, tested the processor on another computer and worked, had to change the motherboard (bought one for 20$) and everything is fine now, thanks everyone for your help. I'm gonna be careful next time I clean
Hello, I have a dell optiplex 7010 MT today i clenaed it a bit because it had a lot of dust I took out 2 sticks of 4gb of ram out because I wanted to put it in another PC and I left 2 sticks of 8 gb inside also disconnected the SSD and the graphic card to clean it. After I put everything inside again I connected it and doesnt turn on, just the orange light from the power button flashes. I have tried everything from put in back the original PsU ( i currently have a corsair CX 550) testing it withour graphic card, without SSD, with different sticks od ram in different places and nothing  Pd: sorry if my english is bad
Optiplex 7010 orange light