ATX Power Supplies Fuse

ATX Power Supplies Fuse

ATX power supplies are otherwise known as PSU’s (Power Supply Units) where the standard kettle lead plugs into the PC and runs to the electric socket. When you plug your computer into the electric mains and the other end into your PC you are effectively supplying power to the PSU. As with the majority of electrical devices there is a fuse required. There is a fuse for the plug that is inserted into the electrical mains and there an ATX power supplies fuse.

When running configuration changes on ATX power supplies fuses it is 100% imperative you take care!!!

As a word of warning before trying your hand at anything that involves high voltage electrical charges you should always take the up-most care when handling.

The most important thing to remember before attempting any maintenance on electrical devices is to make sure you have unplugged the power cable from the PC. Do not attempt any work on the PSU if there are any external wires running into it as it is easy to take for granted the cable is detached from the electrical mains, but this is a risky assumption as you could have cut off the wrong socket.

Another significant aspect to note is to realise PSU power supplies may still contain a certain amount of electrical charge even when it is disconnected from the mains electrical socket. This could also give you a scary shock.

ATX power supplies fuse vary in style

ATX power supplies fuse applications are present in nearly every PSU found in today’s desktop machines. This is one of the only serviceable parts in a PSU and it is possible to swap it out if your final troubleshooting diagnostics have pointed towards the PSU posing the problem. There are different types and depending on the style of ATX power supplies fuse your job of replacing the fuse is either going to require some skill or pure simplicity.

  • More skill is required to change the most common style fuse as this is soldered onto the circuit board. This means taking out the circuit board to operate a soldering iron to replace the fuse.
  • Easier versions just use a spring clip which is keeping the fuse in place.
  • Another simple fuse is just twisted off and a new fuse twisted back in.

How do I know if the fuse is problem?

Well to start with there will be no power going into your PC so it should not be switching on basically. If you have already checked the plug socket and fuse on the kettle lead, plus tried an alternative kettle lead you know it must be the PSU that is the problem. The PSU may not be completely ruined if the problem is just the ATX power supplies fuse.

Use an Ohmmeter to check the fuse. If the fuse is still OK then the reading should be 0.1-10 ohms, if not then there will be resistance meaning the fuse needs changing.

Before changing an ATX power supplies fuse make sure you feel confident. If you feel you are not experienced enough with electrical products then the cost of a new power supply is probably cheaper than hiring someone to change the fuse for you.