Resolved PSU Green Light Unit will not start.

My main computer's psu shows a green light but will not start computer.
It appears the 5.0vdc trickle voltage is not there. If I open the psu can individual parts be obtained or do I have to go to a new PSU?
This is a standard ATX 24 pin style, 350 watt. (Delta Electronics DBS-350AB-8)

 

Repairing a PSU can be tricky & would not necessarily save you money.

My advice - chuck it & get a new one.

 

I've heard you can get quite a shock by touching the wrong part of an open power supply. My fan went out on an old Axio PS, but I was too chicken to repair it. I found an energy efficient model on eBay for not too much money.

 

Its true. The power supply is of Switched Mode Power Supply type. Here the AC input voltage is first converted to DC. This stage has large capacitors which can give you quite a shock if not handled properly. So its not recommended to mess around.

 

Make no mistake, anything that plugs into the wall can kill!

The large caps mentioned above can throw you across the room leaving painful scorch marks on your fingers, but not likely kill you. Coming in contact with live AC inputs, on the other hand, can send you to your grave.

I don't advise opening a PSU for any reason unless you are a trained technician, experienced in electronics safety procedures - even to replace a fan - especially not with that PSU. Delta PSUs are not known for quality construction, efficiency, or reliability. I would replace it with an 80+ Certified PSU from a reputable maker. I like Antec and Corsair PSUs.

Note the green light would suggest to me the +5Vsb voltage is present. This is what you are calling trickle - it's not trickle, but the ATX Form Factor Standard required "standby" voltage.

While not conclusive, you can test the supply with a PSU Tester. But because these testers (and most multimeters) don't test for ripple, the conclusive test is to replace the supply with a known good one.

 

Thanks Guys for your time!

 

I wanted to replace my PS fan, but I could not access the screws without bending the side of the metal case. The screw heads were facing the electronics side of the unit which made the screws extremely difficult to get to.

Axio is not known for the best of quality, so I replace the PS with a 450 watt Antec Eathwatts.