So to today a friend gave me a gpu and my old psu couldnt handle it (when i putted in the new gpu the back green led started flash and it didnt boot). So i plugged my older gpu back in but now the monitor doesnt show anything (it doesnt reaches bios). I just press the button to boot and the cpu, case fan start the hard drive starts. BUT. Because im working on an old system my gpu doesnt have fan (only heatsink, i dont know why) and (OMFG) it hasnt a 3pin cable to plug her on the motherboard (the gpu is geforce 210 asus 512 mb version). So im not really sure that the gpu is working properly. So! I think that when i plugged the knew gpu the psu got broken or something. Am i right? ( the psu is an old garbage and because of that i believe that the psu could be easily damaged)