I have an old computer power supply I'd like to do something with. The problem is that it isn't conventional; the motherboard connector has few pins and there is no green wire. There is a blue wire that seems to go to about 1-2 V but connecting this to a black wire either with a 20 ohm resistor or directly elicits no response. Neither the fan starts nor does a voltage appear on the other outlets.

Aside from the motherboard connector it only has two HDD molex and one FDD molex connectors.

The PSU is a Dell SA145-3433.

 

Make/model of power supply?
There is often a connection list printed on the supply. Can you give us a photo of that?

 

Make/model of power supply?
There is often a connection list printed on the supply. Can you give us a photo of that?

Hi. The make/model is Dell SA145-3433.

I don't think the information listed is useful in powering it up. I don't think Dell wanted to help people like me! My interpretation of the date code suggests it might be from 1994.

 

It is normally pin 16 ( the 4th pin from the right bottom row). What colour wire do you have there?



EDIT: You may actually have difficulty with a Dell Power Supply as it may be Dell proprietary - see this

 

It is normally pin 16 ( the 4th pin from the right bottom row). What colour wire do you have there?

View attachment 142165

It's not an ATX power supply so that does not apply. The motherboard connector is shown in the first picture and it has only one row of 12 pins.

 

I can't find any information on that supply. There are some connectors with 12 pins with one pin unconnected like yours, though the colours don't match. Those connectors do not have a pin to remotely switch the supply on. If it is that kind of supply then it would seem that yours is faulty.

 

Yeah, just realised this @seanspotatobusiness (please see my edit) Sorry can't help with this.

 

It's not an ATX power supply so that does not apply. The motherboard connector is shown in the first picture and it has only one row of 12 pins.

Not starting probably means its phutted.

 

I have an old computer power supply I'd like to do something with. The problem is that it isn't conventional; the motherboard connector has few pins and there is no green wire. There is a blue wire that seems to go to about 1-2 V but connecting this to a black wire either with a 20 ohm resistor or directly elicits no response. Neither the fan starts nor does a voltage appear on the other outlets.

Aside from the motherboard connector it only has two HDD molex and one FDD molex connectors.

The PSU is a Dell SA145-3433.

At psus use the Grey Pson wire,.

 

It is normally pin 16 ( the 4th pin from the right bottom row). What colour wire do you have there?

View attachment 142165

EDIT: You may actually have difficulty with a Dell Power Supply as it may be Dell proprietary - see this

Another good source is pinouts.ru

 

Hello, if i remember correctly this power supply is an old AT type.
"AT power scheme is the original power scheme that most of the older computers used. AT-style computer cases had a power button that is directly connected to the system computer power supply. "

Tree possible solutions:
1. look somewhere (ebay) to find a good condition AT supply.
2. repair it, professional skills required
3. use a new atx and make a adaption to AT connector.


best regards

 

Grey Wire = Ps On