Question Desktop PC suddenly crashed, now won’t boot; motherboard or CPU?

[Kitradu]

I recently moved the guts of my PC to a different case. At first, everything turned on fine. Windows started up, I checked my drives, transferred some files to make sure things were connected and working. All okay. Left it on for a couple hours then tried to start Baldur’s Gate 3 which almost got to the title screen (my cursor changed to the game cursor), then my computer crashed. It rebooted, I got back to the desktop, but before I could really check anything it crashed again and it hasn’t booted since. No bios screens. I believe the PSU is fine. I went through the trouble shooting I could think of, unplugged everything, down to CPU, fan, and main hard drive (an NVMe, which is fine, I have an external usb housing for an NVMe and checked it on a laptop, the drive is still accessible). I can get it to “power” up, but no boot. No bios. Just fans and lights. I’ve even tried plugging it in to a different outlet in another room, no difference. I *think the motherboard is okay BECAUSE things power up (I removed the battery and also touched a screwdriver to the little cmos connector pins to try and reset the bios). I pulled out each stick of ram, then tried each one individually. The graphics card shows a red indicator if the PCIE isn’t plugged in, but even completely removed, still nothing. I fear it’s the CPU. I did try to install a water cooler in the move, unplugged that and reinstalled the original CPU fan in that stripped down attempt. Would a fresh bead of thermal paste help? Is there a surefire way to tell, on my own (I don’t have spare parts or anybody with my same build to exchange parts to find out) if it’s the mobo or cpu?

 

[rgd1101]

full system spec? include brand and model of the psu

 

[Kitradu]

ASUS

G10CE-US564

ROG Strix G10

User Guide, Mouse, Power Cord, Warranty Card, Wired USB Keyboard

Intel

2022

Intel Core i5-11400F

NVIDIA

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[Kitradu]

ASUS

G10CE-US564

ROG Strix G10

User Guide, Mouse, Power Cord, Warranty Card, Wired USB Keyboard

Intel

2022

Intel Core i5-11400F

NVIDIA

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Brand

[/th]
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Model Number

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Model Name

[/th]
[th]
Built-In Media

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Processor Brand

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Model Year

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CPU Model Number

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Video Processor

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The PSU is 500W, but I don’t know the brand, currently at work. I have two, I did try switching them out, both provide the same results. (The GPU is an RTX GeForce 3060)

 

[DaleH]

The PSU is 500W, but I don’t know the brand, currently at work. I have two, I did try switching them out, both provide the same results. (The GPU is an RTX GeForce 3060)

Since the problem only occurred after replacing the case, I would suspect something related to that. Make sure all connectors and components are properly secured.

 

[Kitradu]

The PSU is 500W, but I don’t know the brand, currently at work. I have two, I did try switching them out, both provide the same results. (The GPU is an RTX GeForce 3060)

Before crashing, it was plugged into an ARESGAME 500W AGV500. Was working. Previously known to work, was already in the case I switched to.

The original case, a prebuilt from ASUS as listed, had an ACBel P2B 500W API 5501BP2, which I then plugged into the stripped down components and got only the fans and lights, no bios or boot.