[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

 

[ferguson1951]

Hello again. I received some money and taking advantage of Black Friday I bought a new mobo. I carefully inserted the CPU and all the rest but still no luck: the PSU and CPU fan turn for one sec and then stop.

 

[--SID--]

What's the exact brand and model of the new motherboard?

 

[SkyNetRising]

I bought a new mobo. I carefully inserted the CPU and all the rest but still no luck: the PSU and CPU fan turn for one sec and then stop.

Do the same thing again.

Assemble pc outside of pc case.
Connect only essentials:

cpu + cpu cooler,​

psu - 24pin +8pin CPU power connectors,​

motherboard,​

ram,​

power switch,​

pc beeper.​

No usb devices,
no front panel connectors,
no sata cables
no graphics card.

Show a photo of your setup.
What model motherboard did you get?

Test, if it beeps without ram installed.

 

[ferguson1951]

Exact same mobo, done as you just said. Nothing. Cleaned CPU and socket with special liquid for electric contacts, Nothing.

 

[ferguson1951]

Can I check what Bios version the mobo has?

 

[SkyNetRising]

Can you show a photo of your system assembled outside of pc case?
Does it beep without ram installed?

 

[ferguson1951]

I think I made it. I read the leaflet that came with the mobo and it seems I was connecting the 4 pin Power cable in the back 4 (of the 8) Power socket pins instead of the 4 front ones. Does it sound right?

 

[SkyNetRising]

Cleaned CPU and socket with special liquid for electric contacts,

You should not be touching cpu socket pins at all. Ever.
Probably bent them again.

 

[SkyNetRising]

I think I made it. I read the leaflet that came with the mobo and it seems I was connecting the 4 pin Power cable in the back 4 (of the 8) Power socket pins instead of the 4 front ones. Does it sound right?

It should not be possible to insert those connectors in wrong orientation (without using excessive force).

 

[ferguson1951]

No, I just sprayed some liquid without touching the socket. Anyway, now the fan turns but I get no beep from the beeper. Something is still missing.

 

[SkyNetRising]

No, I just sprayed some liquid without touching the socket.

What liquid?
Is it electrically conductive?
How fast does it evaporate?

 

[ferguson1951]

Yes it is, I dont know how fast it evaporates but itmust have done by now. I went back to the brand new PSU but the mobo fan turns just for 1 sec.

 

[SkyNetRising]

Still waiting on that system photo.

 

[ferguson1951]

https://imgur.com/qy95QWW

View: https://imgur.com/qy95QWW

 

[SkyNetRising]

PC beeper not connected.
Power switch cable not connected.
SATA cable connected.

 

[ferguson1951]

I unplugged SATA cable.
Unplugged beeper and power switch in case there was a short and started system with screwdriver. No luck.

 

[ferguson1951]

Look , my friend, I am really down. I will leave it for tonight. Heartful thanks for your patience. I am really down. I will take the matter up some other time. Thank you.

 

[--SID--]

Where's the RAM?

Looks like the 4 pin of the 24 pin is not fully inserted. And there's a gap between the 20 pin part and the 4 pin.

 

[ferguson1951]

Inserted RAM, inserted all correctly.No luck

 

[ferguson1951]

I don't know how to check the Bios version if the build does not work but I would be surprised if it was old because these mobos are made for 8th and 9th generation Intels. Anyway, I know the appropriate Bios for a i5 8500 is 0212 but I don't know how to check. One thing I can do is take only the CPU to the technician and verify that it is OK.

 

[ferguson1951]

Found this:
PRIME B365M-K BIOS 2208 Support Windows 11 by default, no settings changes required in the UEFI BIOS.
It looks like the wrong Bios

 

[--SID--]

Found this:
PRIME B365M-K BIOS 2208 Support Windows 11 by default, no settings changes required in the UEFI BIOS.
It looks like the wrong Bios

i5-8500 is supported with the release BIOS. Can't go wrong there.

W11 has nothing to do with it because you can't even enter the BIOS. There's a hardware issue somewhere. You've changed the PSU and motherboard. The CPU and RAM are the next to rule out.

 

[ferguson1951]

Then there is only one thing left: as soon as I am free I will take the CPU to the technician and have it tested. Thanks a lot for your help, buddies. Have a nice day

 

[SkyNetRising]

Check cpu socket pins.
Check if cpu is installed/aligned properly.

 

[ferguson1951]

The cpu socket is perfect. I am not sure about the Ram because it comes from a fried PC, so I am buying a new one from Amazon. The Ram is the only thing that worries me because most things in this PC are new and the CPU was properly alligned during my tests. Let's have a little patience, we are approaching the end of the story. I have not taken the CPU to the technician because he wants to have the full PC . I will propbably do that test once my doubts about the Ram are cleared.