Question CPU not turning on. Any help appreciated.

[Shade__90]

Hello first time pc builder here, as the title says the cpu is not turning on, the fans, gpu, and cpu cooler all turn on. I have checked the parts for damages and can't find anything. The cpu doesn't have any bent pins nor did thermal paste get into the pins. The motherboards red led error light for the cpu is lit up thats how I know its a cpu issue. Alse the bios does support a 5000 series cpu its version is 7d54 v1.1.
My specs are
CPU
AMD Ryzen 9 5900X 3.7 GHz 12-Core Processor
CPU Cooler
be quiet! Dark Rock Pro 4 50.5 CFM CPU Cooler
Motherboard
MSI MAG X570S TOMAHAWK MAX WIFI ATX AM4 Motherboard
Memory
TEAMGROUP T-Force Vulcan Z 32 GB (2 x 16 GB) DDR4-3200 CL16 Memory
Storage
TEAMGROUP MP33 1 TB M.2-2280 PCIe 3.0 X4 NVME Solid State Drive * 2
Video Card
EVGA FTW3 ULTRA GAMING iCX3 GeForce RTX 3070 LHR 8 GB Video Card
Case
Corsair 4000D Airflow ATX Mid Tower Case
Power Supply
Corsair RM1000x (2021) 1000 W 80+ Gold Certified Fully Modular ATX Power Supply
Case Fan
ARCTIC P12 PST 56.3 CFM 120 mm Fans 5-Pack
Any help would be appreciated.

 

[drea.drechsler]

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Any help would be appreciated.

You have it to the point it powers up at least...fans and lights.

Did you reset CMOS? It's often necessary...follow instructions in the manual.

I'd suggest checking and rechecking all connections, make sure they're fully inserted. The 24 pin power connector and memory DIMM's can be especially difficult to get fully seated. The DIMM's should click on both ends. The CPU power connection and GPU power connection can also be problems.

Is the monitor connected to a GPU output...not one on the motherboard?

If you can't get it running in the case it's often helpful to set it up in a breadboard with everything out on the work bench, motherboard sitting on a piece of cardboard. That way you can gain easy access to all connections to make sure they're TIGHT and secure.

BTW, once you get it to start up into BIOS and BEFORE you install Windows, update to the latest BIOS revision, 7D54V14. It fixes several problems and is more compatible with Windows.

 

[Shade__90]

You have it to the point it powers up at least...fans and lights.

Did you reset CMOS? It's often necessary...follow instructions in the manual.

I'd suggest checking and rechecking all connections, make sure they're fully inserted. The 24 pin power connector and memory DIMM's can be especially difficult to get fully seated. The DIMM's should click on both ends. The CPU power connection and GPU power connection can also be problems.

Is the monitor connected to a GPU output...not one on the motherboard?

If you can't get it running in the case it's often helpful to set it up in a breadboard with everything out on the work bench, motherboard sitting on a piece of cardboard. That way you can gain easy access to all connections to make sure they're TIGHT and secure.

It is connected to the GPU output, and I triple checked all the connectors there as secure as they could be. From what Im reading my best guess is that I was just unluck enough to get a bad CPU. But no I have not reset CMOS i couldn't figure out how to remove the battery, nor has anything i've read said that that's a common thing that needs to be done.

I doubt its a bad motherboard considering everything but the CPU works.

 

[drea.drechsler]

It is connected to the GPU output, and I triple checked all the connectors there as secure as they could be. From what Im reading my best guess is that I was just unluck enough to get a bad CPU. But no I have not reset CMOS i couldn't figure out how to remove the battery, nor has anything i've read said that that's a common thing that needs to be done.

I doubt its a bad motherboard considering everything but the CPU works.

Definitely reset CMOS before going the RMA route...they'll want you to anyway. Any time you change CPU or memory you should reset CMOS to force the CPU to retrain memory. It's not hard, the battery is probably under the GPU. Lots of people swear you don't have to, some are lucky and it works, some think crashy computers are normal too.

ADD... Oh and forgot this: after the reset give it a couple minutes to retrain memory before giving up on it. It may even shut down and restart once or twice.

 

[Shade__90]

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ADD... Oh and forgot this: after the reset give it a couple minutes to retrain memory before giving up on it. It may even shut down and restart once or twice.

unfortunately resetting the CMOS didn't change anything, I still have CPU red led error light on.

 

[drea.drechsler]

unfortunately resetting the CMOS didn't change anything, I still have CPU red led error light on.

Well, if you have to go the RMA route resetting CMOS will help with AMD's tech support. DOA CPU's are just extremely rare, I'd suspect the motherboard first. A bad VRM on the motherboard could very likely do the same thing and DOA motherboards are more common.

But then this assumes your board really does have a Zen 3 compatible BIOS rev. Did you have another CPU to put in the board to confirm the BIOS rev. level? If so, then I guess it's been ruled out. But if not that's something to consider too.

 

[Shade__90]

My board does have the required BIOS, the version I posted originally is listed on MSI's website as being compatible, I do not have another cpu to test it with though. I doubt the motherboard is damaged because everything else works, it is only the cpu thats having issues.

 

[kurdtnz]

Im in the UK and looking at your motherboards support page, MAG X570S TOMAHAWK WIFI (msi.com) there is no BIOS version 7d54 v1.1 ?

 

[drea.drechsler]

Im in the UK and looking at your motherboards support page, MAG X570S TOMAHAWK WIFI (msi.com) there is no BIOS version 7d54 v1.1 ?

Good point...it probably got deprecated by 7d54v12 and removed from available downloads. But the compatibility list says a 5900X is supported from 7d54v10, the launch BIOS rev, so in theory it should work to boot into BIOS at the least.

Unless they removed it for a reason...but then it would be really strange MSI would ship a board with that rev. Makes one wonder if the board might have been a return where someone else munged up a BIOS update.

If I were OP, I'd use the BIOS flashback feature of the board and update to the latest, 7d54v14. Here's a good how-to on a different MSI board but this one will use the same process.

View: https://www.youtube.com/watch?v=mwyQ0Sfz_aw

 

[Shade__90]

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If I were OP, I'd use the BIOS flashback feature of the board and update to the latest, 7d54v14. Here's a good how-to on a different MSI board but this one will use the same process.

View: https://www.youtube.com/watch?v=mwyQ0Sfz_aw

Yeah I've went and did a flashback last night, it took about 5ish minutes to complete but the CPU error light is still lit up, so I can only assume its a dud CPU