Contents
Can a PSU be repaired?
Even when the supply is unplugged, its components can remain charged and SHOCK YOU. If you are in doubt about your abilities, let an experienced repair technician do the work or simply replace the entire power supply. Most power supplies contain very few user-serviceable parts. The one possible exception is the fuse.
What is a fixed ATX PSU?
Fixed cable PSUs have all the cables connected permanently. In my opinion they’re worth the extra cost because they reduce cable clutter for both aesthetics and airflow.
How do you fix a PSU that doesn’t work?
Plug the PSU power cable into a wall socket or surge protector, and turn on the computer. Most power supply models have a light on back of the unit that glows when it’s powered on. If it doesn’t light, try a different power cable and a different socket to eliminate those items as the source of the problem.
What to do if your ATX power supply has no power?
The complaint of this ATX power supplies was no power. As usual one has to remove the 4 screws in order to remove the top casing. The first thing I do was to look at the circuit board for any sign of component failure.
Why is my ATX power supply fuse burnt?
There was a slight burnt mark in the glass fuse. Whenever the main fuse have problem, one has to check on the semiconductors such as the bridge rectifiers, power Fet, transformer primary winding and etc. As expected two of the bridge diodes had shorted. My next check was on the power FET. The power FET was shorted too.
How can I check the voltage on my PSU?
To start the PSU, connect this contact with the black wire (ground). You can do it with a paper clip or tweezers. Voltage on outer power connectors will only appear after the power supply turns on – you can notice it by rotating cooling fan. After the PSU starts, check the voltage readings for all rails.
How many volts does an ATX fan have?
Well, as expected I saw the fan working and measured all the output voltages to be within range i.e. 12 volt, 5 volt, 3.3 volt and etc. Special note: Not all ATX power supplies can run without load.