Is it possible for a faulty PSU to fry a keyboard? A couple of weeks ago my psu started making noises and experience taught me that its likely time for a fan cleaning or replacement. As everything was still working fine and the noise was only during startup i postponed addressing the problem. Then my keyboard started acting weird. Typing double letters & opening random apps. I tested another keyboard but the problem persisted, even on another pc. I cleaned the psu fan and bought a new keyboard and everything worked well for a couple of hours then the 3rd keyboard started acting up. By now i have updated win 10, all drivers, triple checked for viruses and malware. I replaced the keyboard again but the problem came back after a couple of hours as well as the psu fan noise. Any help would be greatly appreciated