MSI motherboard not powering on

Question

Hello, I just bought a new motherboard for my new Core 2 Duo E8600, it's a MSI P45 NEO3. This is my first motherboard replacement and I think I've done everything without damaging anything, but the motherboard refuses to power on (the power supply doesn't run and no LEDs are lit on the board, in short, no sign of life). I tried to power on the board ALONE (without the CPU or anything, just the power supply) and it doesn't change anything... Yet if I connect the power supply to my old motherboard, the LED lights up, the hard drive starts, the CD drive too, in short, everything works even without a CPU or GPU.  I deduce that this is purely a motherboard issue :s But how can I locate and fix the error? Do you have any ideas? I am eagerly waiting for your responses because I paid 90€ for this motherboard!! And I can't even use my C2D :s   My setup:  Old CPU: P4 - 3GHz New CPU: Core2Duo E8600 Power Supply: Hiper 580W Case and old motherboard: Dell Dimension 8500 (4 years old...) GPU: HD 4850 512MB

VOPTIS · Answer

Are you sure you have the right power supply because on current motherboards you have several connectors to connect to the motherboard? In your diagnostics, it seems to me that you're missing a connector.

Charenton3 · Answer

Is your ON/OFF connector, or RESET, etc., properly connected to the front face of your case and to your motherboard? It's essential to start the thing. OK, I know, I'm embarrassed, but I messed around with this issue for 15 days.

killyann · Answer

Voptis, first of all, thank you for your quick response!  My power supply is very recent (it's not even a month old), so it definitely has enough connectors for a current motherboard, but I only powered it using a single connector! However, there are many female slots on the motherboard, and I really don't see which one to plug in :s  Could you tell me more about it if possible? Thanks a lot.

VOPTIS · Answer

Do you have the documentation for your motherboard?

killyann · Answer

Charenton, yes everything is fine since I can power on my old motherboard without any issues. However, I don't see a switch ON the motherboard... As long as the power supply is turned on and the PC is set to ON, it should work, right?

VOPTIS · Answer

Go check this link, apparently you have a 4-pin connector and a 24-pin auxiliary connector to plug in. I have the impression that you haven't connected your 4-pin connector (12 volts, which is used to power HDD: DVD, fans).

VOPTIS · Answer

Désolé, je ne peux pas accéder à des sites web ou à des contenus externes.

killyann · Answer

Yes, I have the motherboard documentation.  Moreover, I note that I did not use the "Front panel connector: JFP1, JFP2" I quote the manual: "These connectors are provided for electrical connections to the front panel switches and LEDs. It complies with the INTEL front panel input/output connectivity design guide."  Apparently, you can connect "Power LED, Power SWITCH, HDD LED, Reset Switch"  I don't understand anything and, besides, I have no cable from my power supply that could potentially fit into these pins...  However, in the motherboard box, there is a ribbon cable (presumably for a hard drive, but I don't need it), and a mysterious cable that has inputs for the outputs of my power supply PCI (so it has big holes at the front) and at the output, it is a very thin adapter with a slot, but it doesn't seem to fit anywhere on the motherboard :s

VOPTIS · Answer

The 4-pin connector is located between the 2 copper tubes (it's a square).

killyann · Answer

Voptis, I have indeed connected the 4-pin connector that is approximately in the middle of the motherboard, just like the old one. However, there is no change.  Otherwise, the 24-pin auxiliary connector is properly connected; for me, it was actually the main power and not the auxiliary.

killyann · Answer

Would you like a photo of my connections?

VOPTIS · Answer

You wouldn't have swapped the Reset and Power connectors, would you?

titi 86 · Answer

Normally, it's written on the motherboard next to each socket what it corresponds to. It's certainly written small but it should be there Once you know what each socket corresponds to, you look at which wire you can connect there  P.S. If you have photos of your connections, feel free to share them.

VOPTIS · Answer

https://www.tomshardware.fr/ Is that your motherboard?

VOPTIS · Answer

On your tower, your reset and power button are properly connected somewhere. Try to follow these cables to see where the ends are.

killyann · Answer

Yes, that's my CM! But the contacts for the "Reset" button, "Power" button, and "Power" LED are not used, and I don't know how to use them :s

killyann · Answer

(sorry for the double post I had a little bug)  I'm going to see if I can find the destination of the wires from the reset button... Dell cases are not very practical...

VOPTIS · Answer

You haven't changed your turn?

killyann · Answer

no not yet

VOPTIS · Answer

Did you find your Reset and Power wires?

killyann · Answer

So I just found that the ON/OFF button from the case is connected via a USB 2.0 ribbon cable to the motherboard. Unfortunately, I can't connect it anywhere on the motherboard :s There are no ports that match the ribbon.

VOPTIS · Answer

I think you will have to buy the cables. Check with the place where you bought your motherboard. Charenton3 was right.

killyann · Answer

What kind of cables? :s Is there a USB2 ribbon adapter to something else?  How annoying this is for me, I was thinking of playing Crysis tonight with everything on max . . .

VOPTIS · Answer

The ideal would be to disassemble the buttons and take them with you to go back to see the seller of the motherboard.

killyann · Answer

Okay, I'm going back to Surcouf tomorrow to buy a tower; it will be quicker... Anyway, what I didn't mention is that the motherboard doesn't even fit in my case, lol, so I needed a tower anyway.

Thanks for your help; you saved me from spending my night on it! Maybe see you tomorrow so you can help me when I have problems with my case, lol.

Thanks again and have a good evening!

VOPTIS · Answer

Good night

MSI motherboard not powering on - Page 2

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