MSI H110M Motherboard only powers up when 4-pin cpu isn't connected

[TheComputerGuy1]

I've recently bought a bunch of new parts to build a new computer and after piecing everything together and see it only boots for a second with all LED's coming on and fans spinning before powering off and powering back on by itself and repeating. I tried removing some wires and came to the 4-pin CPU subsystem power port and when i unplugged that and turned the computer on all the LED's and Fans ran on constant. I have no idea whats happenig to it or who it fix it any suggestions.

List of Parts:
Corsair Graphite 780T Computer Case
MSI H110M PRO-VD, H110, DualDDR4-2133, SATA3, DVI, D-Sub, USB 3.1, mATX
Corsair CP-9020131-UK TXM Series 750 W TX750M ATX/EPS Semi-Modular 80 PLUS Gold Power Supply Unit
HyperX HX421C14FB2/8 FURY DDR4 8 GB RAM 2133 MHz DDR4 CL14 DIMM
Intel Core i5-7500 3.40 GHz Base Frequency Quad Core 6 MB Cache CPU Processor
Asus DRW-24D5MT DVD Super Multi DL Black Internal Optical Disc Drive
Seagate BarraCuda - 4 TB internal hard drive, Silver,ST4000DM004
Seagate Barracuda - 1 TB internal hard drive (3.5", 64 MB SATA cache from 6 GB/s up to 210 MB/s)

 

[EarthDog]

Does the power supply act the same way in another system? Does the motherboard act the same way when using a different psu?

 

[TheComputerGuy1]

The PSU is a brand new just out of the box one i had to get when the other PSU i had did the same thing and the PSU is fine on other motherboards

 

[OptyTrooper]

It would stand to reason that if the PSU powers other boards with no issues then the motherboard is likely to blame. Personally I'd buy a dang ECS (cough..) board over an MSI but that my personal opinion.

 

[trents]

Make sure you don't have any unused standoffs or a misplaced screw or something between the motherboard and the motherboard tray that could be causing an electrical ground out.

Also remove, the CPU and check for bent socket pins.

 

[EarthDog]

The PSU is a brand new just out of the box one i had to get when the other PSU i had did the same thing and the PSU is fine on other motherboards

with this infkrmation, logic tells us its the board, no?

 

[OptyTrooper]

with this infkrmation, logic tells us its the board, no?

That's what I'm saying. Bent pin..maybe. Short in the case I'm thinking no.

I have an MSI H61M-P23 (B3) I got in a trade locally and it's garbage. Sometimes posts fine sometimes not. Same CPU (2500K) in an Gigabyte GA-Z68A-D3H-B3 runs like a top.

 

[trents]

There is also the issue that the H110 motherboard was made for Skylake, not Kaby Lake. Unless you have a Sky Lake CPU to update the bios microcode it might not work at all with the i5-7500 CPU.

 

[wingman99]

Can you get into the BIOS or Boot the OS with the 4 pin unplugged? if you can't and it boot loops with the 4 pin plunged in probably a defective motherboard.

 

[EarthDog]

Good catch, trents. The first bios to support it is from 2016(2.A). I dont recall how these behaved woth skylake to kaby lake, but thought since they are so similar, it works enough to flash..

 

[trents]

Good catch, trents. The first bios to support it is from 2016(2.A). I dont recall how these behaved woth skylake to kaby lake, but thought since they are so similar, it works enough to flash..

On a scale of 1-5 (with 1 being "not at all" and 5 being "very sure")how confident are you when you say, "but since they are so similar, it works enough to flash."?

 

[EarthDog]

Missing a word.... 'should'.

3.5.

In my experience most things like this will boot and get to the bios. Most. I again bring us back to my question from another thread about board partners shooting themselves in the foot by not allowing at least a new cpu to boot and flash. Indeed weve seen it before where that doesnt happen...

His choices are to buy the cheapest skylake cpu out (~$40) and see if it works then flash, or buy a mobo that supports it natively out of the box effectively killing 2 birds with one stone for twice that price.

Edit: Since its new, he may also be able to return the board and buy the proper chipset for the cpu at little additional cost.

...or find a computer place to flash it and see for cheap.

 

[wingman99]

I called MSI and Gigabyte and they said you need the latest BIOS that supports the processor or it won't post. They gave a suggestion a lot of folks borrow or use a cheap sky lake then update the BIOS.

 

[EarthDog]

Way to get down to the bottom of it for MSI and Giga on this chipset.

 

[trents]

TheComputerGuy1, just pick up a Skylake Celeron. You can get them for under $40. Install it and then update your bios. Then remove it and replace it with the i5-7500. Then you can resell the Celeron on ebay.