Ok well I was browsing the Internet and I had this USB cord stripped on the end opposite of the USB and I used it to charge this old flip cell phone I had, it worked fine but that I used it to charge my droid razr and I got two errors one was a USB malfunction and than a high power consumption error and as soon as I got the second one my computer shut off. I tried turning it back on but the hard drive would make this weird noise and turn back off. No screen, no optical drive noise, and no fan. I tried resetting smc that didn't work and also tried the pram and tried moving the ram around and tested the ram that wasn't the problem. Is this my logic board?