CPU EZ debug light on, computer won't turn on when CPU is powered.

[Pakash]

I recently built a desktop and when everything had been plugged into place the first time I pressed the power button it showed life for half a second and then turned off. I have tried reseating my CPU, changing the location of my ram, using 1 stick of ram, and reseating cables on my motherboard. If I unplug my CPU power cable from my motherboard the computer will turn on and stay on but is unusable. Is there a quick fix to this problem and if not what steps should I take to minimize the cost of repairing/replacing?

Specs
Case: Rosewill ATX Mid tower (Challenger S)
CPU: Intel Core I-5 7400 with included Heatsink
GPU: Nvidia Geforce GTX-1060
Ram: 2 Ballistix 8gb RAM cards DDR4
HDD: Seagate 1tb HDD 3.5"
PSU: EVGA 750w 80+ bronze semi modular.

[veeg]

Hello

I assume you have the correct drivers for the vid card? The card could be bad. Can you borrow another vid card to test your system?

[jmarket]

Also check your motherboard is not shorting anywhere on the case. You could dismantle it all and rebuild it all outside the case on something non conductive like cardboard to try it.

[Pakash]

I have tried rebuilding and re seating all the cables again still with the same problem. the problem only occurs with the CPU power socket. if I choose to begin replacing products what pieces should I begin with? the problem appears to be related to either the motherboard, cpu, or psu. I don’t know if the connection on the motherboard is bad, the PSU appears to be working but it could just be faulty and not have enough power to boot the system, or the cpu could be bad. which piece should I replace first?

[Rustys]

What size of spacers for the mother board did you use?
Did you remove the plastic between the heat sink and CPU?
Did you follow the instructions in post # 3

Also check your motherboard is not shorting anywhere on the case. You could dismantle it all and rebuild it all outside the case on something non conductive like cardboard to try it.

How much thermal goop did you use?

[Pakash]

the spacers appear to be about a half inch long
I have removed the plastic seal that came with the motherboard
and I have dismantled all components of the desktop and rebuilt it outside on cardboard without success
the amount of thermal paste I put on there is none, the cpu fan already came with thermal paste on it, I have confirmed it covers all of the CPU. I have thermal paste coming and I could try to reapply it to my cpu?

[Rustys]

the amount of thermal paste I put on there is none, the cpu fan already came with thermal paste on it, I have confirmed it covers all of the CPU. I have thermal paste coming and I could try to reapply it to my cpu?

Would state yes and make sure to remove all of the old before applying the new.

I recently built a desktop and when everything had been plugged into place the first time I pressed the power button it showed life for half a second and then turned off.

Is the system under warranty if so why not have them assist you some of the stuff we may have you do will VOID any warranty and chance on getting the parts replaced.

You stated your specs you did not mention make and model of the motherboard.

[Pakash]

the system itself is not under warranty because its a custom built. although most pieces do have the option of returning, or replacing should it malfunction.
The motherboard itself is a “MSI Z370-A Pro. ATX”
I will post again after applying new thermal paste unless another suggestion is made in the meantime. Thank you for your support and continued support.

[Rustys]

The motherboard itself is a “MSI Z370-A Pro. ATX”

CPU: Intel Core I-5 7400 with included Heatsink

According to the motherboards web site the CPU is not supported by that motherboard.

https://www.msi.com/Motherboard/supp...RO#support-cpu

[Pakash]

well, that would explain it not working now wouldn’t it. I will return this CPU and purchase one compatible with the motherboard and hopefully that will work. Thank you!

[Rustys]

Not a problem any time that is why we are here.