I just finished building my PC like a week ago. I just noticed there is a faint buzzing noise while playing a game (the noise also comes out from my speakers). I tried to pinpoint the noise and turns out it's coming from inside my computer.
The buzzing noise sounds like it's coming from either power supply or graphic card.
I have to calculate the ripple voltage of four different capacitors in a power supply. the power supply is a transformer, bridge rectifier, load resistor and capacitor would go across the load.
I used multisim to simulate the circuit. I looked at the ripple which has a peak to peak value.
my question is, to get the mean dc value, what is the formula for this.
I have to replace a very old UPS. We've got a new one. I'm not really a sys admin, but have to act the part, as the previous one left and, well there's no one else. He had it set up with 2 UPS's, and split the power supplies from each server (5 total) so that 1 power supply went to 1 UPS, and the other power supply went to the second UPS. We've got the new UPS in place.
Perhaps a power supply failure of a critical supply source preventing the cmos bios from running.Remove the PS, connect a jumper from pin 19 (green) to ground (black wired pins, perhaps 20 or 21). This turns on the supply.The fan in the supply should run and stay running.Then, using a listing of interface voltage levels for the power supply....probably ATX standard if a desktop...measure the
I can hear a major buzz coming from a power strip that I have even with no load on it. What could be wrong with it and should I bother fixing it or just toss it out and buy a new one? And also is there any hazard to use that power strip?
I have a Lenovo Y460p running Ubuntu 12.04 (64-bit). The battery does charge normally, but unplugging the power supply only very briefly shows the correct battery indicator. After about 1 second, it reverts to the charging indicator.