[SOLVED] Molex connector problem ?

[ferguson1951]

Hello everybody.
I am writing from Italy.
I have an ATX PSU with various output cables including a 4-pin Molex which I think is for the mobo power supply.
But my micro ATX mobo has an 8-pin connector.
How do I go about solving this problem ?
Your help will be much appreciated.
Thanks a lot and best regards

Mobo: Asus Prime B364m k
PSU: Delta Electronics 350 w GPS-350EB-200 B
ram: Samsung DDR4 4Gb.
GPU PCIE card : (arriving) ASUS EN 8400 GS SCHEDA GRAFICA VIDEO SILENT PCI EXPRESS 512 MB GPU GRAPHICS CARD
CPU: Intel i5 8500
Case: HP ProDesk 400 G3 MT

 

[--SID--]

Now the build has an i5-8500 still nothing works.

What happened to the i5-8500?

 

[ferguson1951]

Will it not turn on even without a GPU card?
As it is now, only the mobo's yellow led is on.

 

[ferguson1951]

What do you mean what happened to the i5 8500 ? Its mounted

 

[SkyNetRising]

What do you mean what happened to the i5 8500 ? Its mounted

Your post #35 is confusing.
You should mention, those are not specs of your pc.

Also you should edit initial post and list specs of your system there.
It's very inconvenient to find specs by searching through 50+ posts.

 

[SkyNetRising]

I found a socket with various pins and I detected the PWR+ Ground ones and I put a jumper there but no luck

Ram is standard desktop DDR4. So at least that is compatible.

You do not put jumper on power switch pins. You connect momentary switch to it.

Where do you get those crazy ideas?

cutting psu cables,​

cutting fan cables,​

shorting CLR_CMOS pins,​

shorting PWR_SWITCH.​

​

All of those are bad ideas. Seems like you're just trying things on random.

 

[ferguson1951]

Thank you Sky Net Rising. Proper power switch will arrive Monday and GPU card will arrive a couple of days later. I will come back here when all is available and tell you how it is going. Thank you very much and see you soon.
I added cable because the PSU ones were too short initially. I used my knowledge of traditional electronics.-

 

[ferguson1951]

I edited the first post. I don't know how to do this job properly, that's why I opened this thread. I cooperrate the best way I can .

 

[ferguson1951]

Hi man, the GPU arrived and I inserted it in the PCIE slot. I haven't turned the PC on yet. I am sending you two pictures of the build. Please be so kind as to examine them to see if everything is OK. Thank you very much

https://imgur.com/v6MJHuz

View: https://imgur.com/v6MJHuz

https://imgur.com/EpEWfhn

https://imgur.com/EpEWfhn

View: https://imgur.com/EpEWfhn

View: https://imgur.com/EpEWfhn

 

[SkyNetRising]

Please be so kind as to examine them to see if everything is OK.

You still haven't changed PC case and PSU.
Also rear fan is installed in wrong orientation.

Other than that I don't see any glaring issues.

 

[ferguson1951]

You still haven't changed PC case and PSU.
Also rear fan is installed in wrong orientation.

Other than that I don't see any glaring issues.

Thank you so much. I spent about 300 bucks on this PC which, for me, is a fairly high expense because I have a small pension. That is the reason why I do not want to spend more than that. I will correct fan orientation. Now it is late, I live alone, I will come back with news tomorrow morning. Thank you so much.

 

[SkyNetRising]

Don't you have some friends/relatives, who deal with computers?
They probably have multiple old pc cases lying around in some storage closet.

Just checked my storage closet. Found 5 old pc cases in there. LOL

 

[ferguson1951]

I gave the PC a very quick try but it still won't work. I don't know why and my opinion is that although you gave me a very good hand you cannot do much more until you could have it by you. I don't know. There is nothing else I can do to try a solution so I guess I will have to take it to the technician and see what he says.
The PSU by itself works, I tested it by connecting the green and black cables.

 

[SkyNetRising]

The PSU by itself works, I tested it by connecting the green and black cables.

Did you check all voltage rails on PSU?
PSU fan spinning doesn't mean - it is fully functional.

 

[ferguson1951]

The PSU voltages are ok. There cannot be a short because I insulated mobo and PSU from the case still it looks like no current is arriving to the mobo.

Recently a PC was given to me that was completely dead but I connected the little mobo test card aznd it showed FF which I think means Failure. But in this one of mine the test card shows nothing.

 

[SkyNetRising]

Did you read motherboard user manual?
Are you shorting correct pins to start the pc?

 

[ferguson1951]

I put a 2-pin Power Switch connector in the place the manual showed there was PWR and GND

 

[ferguson1951]

Today or tomorrow I should be receiving a brand new PSU. It is cheap but brand new and 650 W. I don't know but I have a feeling that the PSU you don't like is not pumping enough "juice"

 

[ferguson1951]

No luck. I installed the new PSU 650 W but now non even the mobo's yellow led turns on.

 

[ferguson1951]

I unplugged everything except for the new PSU, the new CPU fan and the PSU 8-pin power connector. The mobo's yellow led is lit but the thing is: it looks like the mobo is faulty, yet it is difficult for me to believe it.

 

[SkyNetRising]

Did you try assembling pc outside of pc case?

Do that and have only these parts installed/connected:

motherboard,​

cpu,​

cpu cooler (with fan),​

single ram module,​

psu.​

No graphics card,
no front panel connectors,
no sata cables / sata drives,
no m.2 drives,
no usb front panel connectors.

Show a photo, how you have connected everything.

Try to start the pc by jumping power switch pins.

 

[ferguson1951]

I left the CPU fan because it is brand new

https://imgur.com/RECe542

View: https://imgur.com/RECe542

 

[SkyNetRising]

Power switch doesn't seem to be connected to correct pins.

You said, you have read user manual.
Front panel connectors can not be connected on random. You have to connect them exactly as in diagram or it won't work.
I though, this was obvious.

 

[ferguson1951]

I am sorry but the way I connected it was also with GND. I could not see the difference. Anyway, I changed it to the way you said and now the CPU fan turns for a while and then stops. If I switch the PWR switch on again, again the fan turns for a little while and then stops.

 

[ferguson1951]

The mobo test car5d shows FF. I guess the mobo went bad.
Could it be that the RAM is faulty? It comes from a bnurnt out PC

 

[SkyNetRising]

Check if cpu is installed/aligned correctly.
Triangle in corner of cpu has to match triangle on cpu socket.

Also check, if cpu socket pins are not broken/bent.