Solved no power in power button & DVD drive of pc

July 20, 2015 at 19:54:05
Specs: windows
When I connect my PC with electricity the light of motherboard on but no power in power button and DVD drive. But light shows in mouse and keyboard. So l can't turn on my PC.

See More: no power in power button & DVD drive of pc

Report •

✔ Best Answer
July 21, 2015 at 22:38:15
Oh, SMPS is the power supply. I had to google that one.

In order for a computer to work the power supply must provide several different voltages at sufficient current. LEDs usually need 5 volts; fans need 12 volts; drives need 5 or 12 volts or both. In addition to those voltages, a motherboard also needs a 3.3 voltage source and a -12 volt source. Here's the pinout of a typical power supply showing the voltages it supplies:

http://www.smpspowersupply.com/conn...

Sometimes a power supply will fail to provide one or some of those voltages so that some peripherals may work but the computer as a whole won't work.

Based on your brief description the power supply seems to be the likely problem, although that is by no means a certainty.



#1
July 20, 2015 at 20:04:17
Anything displayed on screen/monitor?

Report •

#2
July 20, 2015 at 21:33:27
Did anything happen to it or did you make any changes to it between the last time it worked OK and the first time it didn't?

If not, and if I understand your description, I'd suspect the power supply. It's providing the 5 volts the LEDs need but nothing else.


Report •

#3
July 21, 2015 at 22:10:10
Is it the failure of smps? If yes, then why the mouse is lightning?

Report •

Related Solutions

#4
July 21, 2015 at 22:38:15
✔ Best Answer
Oh, SMPS is the power supply. I had to google that one.

In order for a computer to work the power supply must provide several different voltages at sufficient current. LEDs usually need 5 volts; fans need 12 volts; drives need 5 or 12 volts or both. In addition to those voltages, a motherboard also needs a 3.3 voltage source and a -12 volt source. Here's the pinout of a typical power supply showing the voltages it supplies:

http://www.smpspowersupply.com/conn...

Sometimes a power supply will fail to provide one or some of those voltages so that some peripherals may work but the computer as a whole won't work.

Based on your brief description the power supply seems to be the likely problem, although that is by no means a certainty.


Report •

Ask Question