POWER SUPPLY TROUBLESHOOTING

POWER SUPPLY TROUBLESHOOTING

                

                                   

power supply problems fall  into two categories. The first are those that occur during the computer's startup . The second are those that occur during normal operation. 

STARTUP  PROBLEMS:-

                   When you turn  on your computer and nothings happen, there are a few simple checks you can make before you alarm. 

        FIRST .....check to see if the computer is plugged in and that it is receiving power .  you can check the wall outlet by plugging  in a lamp, or something into it. 

          SECOND....if the power from the wall outlet is good, then checking the computer is next. Turn the computer on and notice the monitor, the keyboard, and the system unit to see if the indicator lights are on. check for any computer beeping as it boots. if it beeps more then normal, that indicate a problems and checks the manual for the beep codes. 

         THIRD......if you don't see any lights or the fan in the power supply working, the power supply, is faulty. If you turn on the computer and its works but you don't here the power supply fan working, turn the computer off at once since the fan cannot cool the system, this could lead to over heated chips and other components. 

POWER SUPPLY CONNECTORS:

         Different computers have different power supply connectors. The PC/XT and the AT as well as the LPX PC systems have two six -pin connectors attached to the main board. They are normally marked P8 and P9. The ATX, the NLX, and the SFX PC systems have the 20-pin connectors that attached to the motherboard. The power connector that connects to the hard drive, CD-ROM drive and other components are marked P10 to P13.

The Power Supply Provides electrical power to the components the use power such as the Hard-Drive. Power supply also prevent the computer from operating at the wrong power level. The computer is plugged into the wall outlet, which contain 110-120 volts of alternating current.

But the components inside the computer cannot use the high voltage or ac. This parts work at low voltage, which is why the power supply must convert the high household current into the low current, needed to the run the computer. Most PC component work well at 3.3-5 volts DC, or direct current. The many component in the computer required different voltage such as the CPU and RAM. The Fan in the power supply get the current before any other components get their power and sometime the fan in the power supply will run in just perfect while the power supply may be deflective. Power Supply have a watt or Volt- Amp rating that describe the power it can produce.