Is this a problem with the CPU, the motherboard, or something different?
Is this a problem with the CPU, the motherboard, or something different?
Hello,
I recently switched my AIO cooler from a Corsair H100i Pro XT to an Arctic Liquid Freezer 360mm. The installation went smoothly, but the PC is now failing to POST. It powers on, yet there’s no display at all. The case fans light up briefly but only spin for a couple of seconds.
It seems unlikely the cooler is blocking the boot process, as I confirmed it’s properly connected to the CPU 4-pin socket. I suspect another component might have failed simultaneously. Unfortunately, my motherboard lacks debug lights, error codes, or sound alerts.
Some users have noted that over-tightening the screws on the pump attached to the CPU can cause boot issues. I loosened them slightly, but the problem persists.
I’ve started troubleshooting by replacing the motherboard with an identical model. I created a stripped-down version of my system—same CPU, PSU, RAM, and GPU. I omitted case fans, storage drives, ARGB controllers, or optical drives. Only a standard CPU air fan was used, not mounted over the CPU, unlike the Corsair or Arctic Extreme coolers. This was done to prevent booting without a CPU fan. I used an external power button connected to the motherboard header to start the PC.
During the first attempt with the modified system, no improvement: the PC turned on but didn’t boot or show a BIOS screen. I shut it down within 10 seconds. It seems the issue isn’t with the motherboard.
On the second attempt, I waited 30–40 seconds. However, the CPU started smoking and shut down automatically. I didn’t try a third time.
The retailer told me the CPU smoking suggests a manufacturing defect, possibly before any smoke appeared. They said CPUs should shut off automatically when overheating, not smoke. This reinforced my suspicion that the CPU itself is faulty.
Help me please!
PC SPECS:
CPU: i7 14700kf
Motherboard: Asus Prime Z790-P
RAM: Corsair Vengeance 32GB (2 x 16GB)
PSU: Be Quiet Straight Power 11 1000w Platinum (nearly expired in March 2026)
NVME BOOT DRIVE: 2TB Samsung
Data Drive: 4TB SATA III 2.5" SSD
Optical Drive: Pioneer UHD
GPU: Zotac Gaming Trinity OC RTX 4070ti
CASE FANS: 4 x 140mm CoolerMaster MF140
Fan Controller: Generic ARGB/PWM
AIO Cooler: Arctic Liquid Freezer III Pro 360mm
Case: Fractal Design R6
The PC is currently in a repair facility since I don’t have the time or funds to test every part.
How much time will you keep it before resetting? Also, the 14th gen includes an RMA program.
I meant to clarify the time frame for resetting the device. Regarding the extended RMA program, I discussed it with Scan in the UK computer parts store. There was no visible damage to the CPU socket, and it would still qualify for the Scan Damage Protect program. Loosening the AIO mounting pressure could affect its performance.
If the system used RAM training, it may take a long time if you’re only allowing seconds to minutes. You should likely get a replacement through that.