What is the Risk with These 2 Used Power Supplies?

[Spotty]

Try CPU + motherboard + ram + GPU. Make sure to plug everything in correctly. Turn the PSU on then bridge the motherboards power switch pins. What happens? 

Are you using any custom power cables, extensions, or cables from other power supplies?

 

Since multiple repair shops have tested it and it worked there must be something else going on that you're doing differently.

[Ankerson]

6 minutes ago, Spotty said:

Try CPU + motherboard + ram + GPU. Make sure to plug everything in correctly. Turn the PSU on then bridge the motherboards power switch pins. What happens? 

Are you using any custom power cables, extensions, or cables from other power supplies?

 

Since multiple repair shops have tested it and it worked there must be something else going on that you're doing differently.

 

Sounds like a short someplace to me....

[TechnicGeek]

Tried that, tried removing GPU, tried removing RAM module, tried moving RAM module to different slot... No changes. Don't use any extensions, only original PSU cables. Maybe motherboard works randomly. It happened to be working in PC repair shops every time.

[Ankerson]

6 minutes ago, TechnicGeek said:

Tried that, tried removing GPU, tried removing RAM module, tried moving RAM module to different slot... No changes. Don't use any extensions, only original PSU cables. Maybe motherboard works randomly. It happened to be working in PC repair shops every time.

 

When the MB lights come on and go out right away then what?

 

Do you flip the switch on the PSU off then on again? What happens?

 

Is the 8 pin EPS connector plugged in correctly?

 

Unplug it and really check.... I have seen them plugged in backwards before.....

[Spotty]

Are you able to post a photo of the system so we could maybe see if something doesn't look right. A short video of what happens when you try to turn it on might help as well if you can record with your phone or something.

[TechnicGeek]

@Ankerson When I flip I/0 swith to I on power supply MB light blinks for 1 second and nothing else happens. Then I what remains is to power on system. I touch 2 pins and nothing happens. If I flip PSU switch to 0 and then I then same thing happens. MB light blinks for 1 second. 8-pin EPS power? For CPU? I have 4-pin connector only on motherboard and on PSU.

[TechnicGeek]

@Spotty I sent you private message.

[Ankerson]

7 minutes ago, TechnicGeek said:

@Ankerson When I flip I/0 swith to I on power supply MB light blinks for 1 second and nothing else happens. Then I what remains is to power on system. I touch 2 pins and nothing happens. If I flip PSU switch to 0 and then I then same thing happens. MB light blinks for 1 second. 8-pin EPS power? For CPU? I have 4-pin connector only on motherboard and on PSU.

 

Yeah, check the 4 pin....

 

I bet it's backwards..... Maybe.... And have seen it happen and it does exactly what you are talking about. Plugged in the wrong 4 Pin off the 2X 4 pin..... Backwards....

 

Make sure the latch on the connector lines up with the lip on the MB socket...

 

 

[Corsair Nick]

@TechnicGeek - I would try the suggestions @Ankerson recommended by switching the 4pin connection for the EPS cable.  When you sent your motherboard in for testing, did you send the CPU with it?  It's possible you have a short somewhere as well.  Are you performing all these tests in your case?

[Ankerson]

11 minutes ago, Corsair Nick said:

@TechnicGeek - I would try the suggestions @Ankerson recommended by switching the 4pin connection for the EPS cable.  When you sent your motherboard in for testing, did you send the CPU with it?  It's possible you have a short somewhere as well.  Are you performing all these tests in your case?

 

 

I remember the 1st time I saw it happen, took me forever to find it..... And I found it by accident... Tugged on the EPS cable and it came right out....

 

But that's what it was, you can plug it in upside down if you use the wrong one....

[Guest]

1 hour ago, TechnicGeek said:

 

 

I took my motherboard, CPU, RAM and PSU to PC repair shop and paid money to check if my motherboard works using my components only. And what do you know? It worked right away and I couldn't believe my eyes. Technician said all works, there is nothing more to check.

 

I tried powering my motherboard using exact same components. It didn't work. Tried plugging off UPS from wall outlet to use battery's power and it didn't work. I took these components to my neighbor on 3rd floor in my apartment thinking electricity in my flat might be not "clean" but it didn't work again.

 

 

No.  There is something changing between scenario 1:  The set up going to the shop and working, vs. scenario 2:  The set up not working at home or at friend's flat.

 

THINK.

 

If all you have is PSU, motherboard and CPU and CPU cooler and it's sitting on a non-conductive surface and it works, what are you adding to the mix?  Another cable?  On a motherboard tray?  Perhaps one with an extra stand off?  Setting it on a conductive surface?  Using memory (board should still power without memory)?  

 

There's something you're missing.

 

[Guest]

37 minutes ago, TechnicGeek said:

@Spotty I sent you private message.

Oh.... So you want Spotty's help and nobody else's? 

 

[Guest]

49 minutes ago, TechnicGeek said:

Tried that, tried removing GPU, tried removing RAM module, tried moving RAM module to different slot... No changes. Don't use any extensions, only original PSU cables. Maybe motherboard works randomly. It happened to be working in PC repair shops every time.

The power connectors that are plugged into the motherboard:  Which ones are they and what do they say on them?

[Spotty]

27 minutes ago, jonnyGURU said:

Oh.... So you want Spotty's help and nobody else's? 

 

It was a video of it not booting. I suggested he post it here but I'll leave that up to him if he wants to or not.

 

System is completely dead. No boot, no fans spin, no lights other than an initial brief flash of RGB when the PSU switch is first flipped (I think this white flash of LEDs near the bottom left of the board is normal for those gigabyte boards, but I'm not sure)

Completely dead, no signs of life when he tried to bridge what I'm assuming are the pwr switch pins (I haven't bothered to download the manual to check). 

 

The graphics card power cable wasn't plugged in and the ram was in the "wrong" slot (first slot and then another attempt in fourth slot from what I watched), but even with that it should have at least tried to boot. Didn't get a good look at the CPU power cable, but it did look like he had an 8pin plugged in not a 4pin like he mentioned here.

It's built on top of the motherboard box, so shouldn't be shorting out on anything under the board.

 

It's 5am here and I just skipped through the video on my phone, so I would still recommend OP posts it here for others to see as there might be something I missed.

Edited September 21, 2020 by Spotty

[TechnicGeek]

@Ankerson "switching the 4pin connection for the EPS cable"

 

What does it mean? I have 4+4 slot in PSU. Is it for CPU? I don't have 4 pin separate cable but I have 6+2 PCIe cable.

 

[Ankerson]

7 minutes ago, TechnicGeek said:

What does it mean? I have 4+4 slot in PSU. Is it for CPU? I don't have 4 pin separate cable but I have 6+2 PCIe cable.

 

 

Yes the 4+4 is for the CPU..

[TechnicGeek]

@Ankerson Should I try connecting 4+4 PSU with 8 pin CPU on motherboard using PCIe 6+2 cable? Is PCIe cable only for GPU?

[Spotty]

1 hour ago, TechnicGeek said:

@Ankerson "switching the 4pin connection for the EPS cable"

 

What does it mean? I have 4+4 slot in PSU. Is it for CPU? I don't have 4 pin separate cable but I have 6+2 PCIe cable.

Your power supply is semi modular. The CPU power connector is fixed to the power supply. If you unplug all of the modular cables you will be left with the motherboard 24pin and the 8pin CPU cable.

 

 

17 minutes ago, TechnicGeek said:

Should I try connecting 4+4 PSU with 8 pin CPU on motherboard using PCIe 6+2 cable? Is PCIe cable only for GPU?

No! PCIe cables are for graphics cards and do not work with CPU!

[OrionFOTL]

It would be best if you took a clean photo showing exactly what's plugged into the motherboard and which cables are plugged where.

[TechnicGeek]

My motherboard and PSU:

 

 

8-pin CPU connector plugged:

 

 

24-pin motherboard connector plugged:

 

 

There is no GPU right now with connected 6+2 PCIe cable but I tested with it and there was no difference. I also tested with CPU cooler attached and it didn't spin. PSU fan didn't spin as well. At least you know motherboard is powered when PSU fan spins.

[quan289]

Hmm...To eliminate the possibility of a short cause by a pinch cable or something, unplugged the modular cables. Only have the fixed 24-pin and 4+4 EPS12V connector plugged in.

 

Also, be aware that you may need to switch the power switch off and then on again. If there's something wrong that is setting off the protection of the PSU, the PSU will cut power and latch off to protect itself.

[TechnicGeek]

15 minutes ago, quan289 said:

Also, be If there's something wrong that is setting off the protection of the PSU, the PSU will cut power and latch off to protect itself.

Wrong with my home electricity or with PSU?

[quan289]

5 minutes ago, TechnicGeek said:

Wrong with my home electricity or with PSU?

I said "if there's something wrong" as a general statement. We are trying to figure out what's wrong right now.

We know that the motherboard, CPU, RAM and PSU works at the repair shop when they tested it, so there shouldn't be anything wrong with those components.

 

Your comment "When I flipped I/0 switch on power supply the Aorus logo led turned on for 1 second only" suggest you are adding something that is causing a protection built into the PSU to detect a problem and is cutting power to the system. The reason why I'm telling you to flip the switch off and on is after each test (unplugging modular cables, moving PSU out of case, etc) is so the protection can reset itself and start supplying power to the MB again.

 

It's not a short cause by a standoff as it is on a MB box. It's not an issue of you forcing to plug in the wrong connectors, as the 4+4 pin EPS12V and 24 pin connector is plugged in correctly. The only thing I see that may cause a protection to go off on the DC side is the two modular connector you have plugged in and whatever component that is plugged into it.

[TechnicGeek]

@quan289 I unplugged all other cables and left 24-pin cable and 4+4 pin cable connected. Motherboard didn't turn on. I do use I/O switch before I make changes.

[Guest]

 

3 hours ago, TechnicGeek said:

My motherboard and PSU:

 

 

8-pin CPU connector plugged:

 

 

 

24-pin motherboard connector plugged:

 

 

 

There is no GPU right now with connected 6+2 PCIe cable but I tested with it and there was no difference. I also tested with CPU cooler attached and it didn't spin. PSU fan didn't spin as well. At least you know motherboard is powered when PSU fan spins.

What do you have that 6-pin SATA/PATA cable going to?