This machine may have finally failed, but I want to make sure this isn't something simple before a rebuild.
This is an ASUS P8-Z77-V with i7-3770 (3rd gen) processor, 32 GB DDR3 and Corsair ATX 750 Gold. Antec Water Cooling and Graphics card both are powered through the board. When I power it on, the post begins and the fan just starts to spin on the graphics card before everything shuts down. No LED lights lit except standby power.
I tested the following:
If I had to guess, the water cooler failed causing the processor to fail or the board has a fault on it. I don't see anything physically wrong with the board, it looks nice and clean. Processor does not smell burned out. Honestly I'm impressed to have gotten 10 years out of it. I just wanted to see if there is something else easy I should be looking at before I design a new system.
You can look over our no POST/BOOT guide for possible additional ideas but it sounds like you have done a lot of troubleshooting already and I would assume there is a failed part from your description thus far. https://community.microcenter.com/discussion/2818/tech-article-how-to-troubleshoot-a-newly-built-pc-that-will-not-post-boot-power-on
A shutdown rather than a hang or restarting in a cycle is telling you something. The motherboard is detecting an event to trigger a shutdown. Either a power or thermal warning, most likely the former. It's not immediate, so it's not a short. Sounds like when it tries to initialize the CPU, the VRM fails and triggers the shutdown. I'd pull your 8 pin CPU power and power it on. See if it just powers on and does nothing. If so, and assuming the CPU hasn't been removed and there's no chance of bent pins, ect. It's the VRM on the board, board needs to be replaced.
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