Computer turns on for a split second then turns off.

I replaced all of the parts you mentioned with brand new ones and still had the same issue.

I've lost count how many times the owner didn't start small on cardboard. But new parts means warranty. Ask them what they want to change out.

The computer isn't in the shop, i'm working on it myself. The one thing I didn't change out with the video card and it looks like that was the issue as far as the computer actually starting. Computer started right up after installing new video card. But it won't post. Screen is black. The error indicator lights on the motherboard are showing a solid red light for the RAM and blinking for CPU. Tried each of the four sticks individually with the same result.

New parts have a warranty so you use that.

I wish you would detail what this PC is made of. Sometimes we have an option for no GPU. Also the number of times I find the CPU isn't supported is far too high. In some cases the CPU is supported but ONLY after the BIOS is updated.

Your problem was: auto turn off in one second. Solved by changing video card. Now power stays on.
Your problem now is: No post. Worked fine for 2 years.

Then it's time for the cardbox test (no case, no hard disk, 1 stick of RAM; only PSU, motherboard with CPU and RAM, keyboard+mouse connected, GPU if no video on mainboard). If that fails, it's one of those components.

Your not following directions.

Your keeping the machine/parts a secret.

Good luck getting help from the forums.

Take the machine to a service counter and let them fix it.

Intel I5 6600
MSI Z170A Gaming M3
Nvidia GTX 970 OC
16 GB Corsair Vengeance DDDR4
Sandisk SSD
Hopefully that gives you what you need although I don't see how it's going to help. Now that I've given you the information that you require could you please take the time to actually read what I post. Because it's painfully obvious that you're not. Telling me to bring it to a service center is no help at all. I could have done that without you. Let's try and stick to the problem at hand.

Bob_B is right. You need to help others help you or you get replies to take it to the shop.


That aside, you don't need the GPU yet.

https://ark.intel.com/products/88188/Intel-Core-i5-6600-Processor-6M-Cache-up-to-3_90-GHz shows it has onboard video.

And for a power up we only need a few parts on CARDBOARD. Once in a while a new to troubleshooting person will not do this step. They are the ones that end up at a repair counter.

Since your cpu has an igp plug the monitor into the mobo and remove the gpu.....test.

You left out the make and model of the psu.

You don't need more than one stick of ram.

You don't need a disk connected.

850 Watt Antec. I have performed the cardboard test. I know that method and I was thinking about a short circuit somewhere as well but that's not the case.

The CPU isn't installed correctly.

I take it as truth your claim these are all new parts so is there any part that isn't new as in just a week old? Maybe the problem parts were not swapped out?

Tell that you have the mobo sitting on a piece of card board.

Tell what is connected or installed on the mobo.