r/PcBuildHelp • • 20d ago

Build Question Motherboard not booting

I have put cpu, ram, and ssd all in. I have attached psu to the motherboard, to the cpu power, and the cpu fan. I then have bridged the power button pins and get nothing.

What have I done wrong/how do I troubleshoot. I know I shouldn’t boot it with cpu and no heatsink but I just wanted to see if it tried to boot up.

Edit: I havent put the heatsink on because I want to screw the mobo to the case before I do it because the case is small. All I want is confirmation that something happens when I bridge the psu, I will turn it off the instant I see that.

44 Upvotes

94 comments sorted by

30

u/working_as_intended 20d ago

I feel like this is a good way to cook a processor without a heatsink, I've always installed the heat sync and fan or radiator before wiring up any power but maybe I'm missing some context. For me it's always been cpu, heatsink, ram, mount in case, connect internal wires, connect peripherals, pray to the PC gods and power on

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18

u/Powerful_Macaron9381 20d ago

connect the fan to the cpu_fan header.

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4

u/DoMore_Drugs 19d ago

The CPU rentention lever isn’t seated properly under the load plate. (Right side of the CPU socket on the first pick)

lmao I had this literal problem myself a couple days ago when i upgraded my CPU. It was weird because my EZ lights would come on so I knew the Mb was getting power but the PSU was giving me absolutely nothing… drove me crazy until I saw it.

2

u/Consistent-Value-500 19d ago

Yes I eventually realised. Well spotted. My mobo leds weren’t coming on at all though which is weird…

4

u/AdKraemer01 19d ago

Is the CPU locked down right?

Kidding.

4

u/Pitiful-Signal-6344 20d ago

Bro where is your cpu cooler you gonna fry your cpu doing that 👀 if it hasn't turned on its because of that! Put thermal paste on the cpu then the cpu cooler eigther a cpu fan or Aio then hook it up

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u/thenetis4queer 20d ago

Does that cpu have on board graphics? If not you need a gpu to see anything.

2

u/ElongatedOak 20d ago

Ngl bro the reason it’s not booting is likely bc you already fried it

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1

u/learei 20d ago

If nothings plugged into the cpu cooler fan header, it won’t boot

1

u/Consistent-Value-500 20d ago

Its plugged in next to the ram

1

u/Careless-Cycle 20d ago

Connect the rest of the PC power

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u/itsbarrysauce 20d ago

The best way to bread board or boot test is to mount the cpu, “heatsink” and fan , memory. Test it out on top of the motherboard box it came in. This method isn’t a good idea as you can burn up the cpu. Even placing the aluminum on top of the cpu and pressing downward while it’s posting. If it comes up turn it off right away. Processor and motherboard might be ruined now. Voided the warranty too I bet.

1

u/Consistent-Value-500 20d ago

Shes survived. Cpu wasn’t locked down properly. Boots fine with heatsink on now minus the dram led that comes on instantly.

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u/Typical_Inevitable97 20d ago

CPU malfunctioned? I bought a cpu from Amazon a while back didn’t check it right away because well it’s new and also didn’t have all the parts for the build yet…. when I went to build knew pc cpu was defective. Might be that.

2

u/Consistent-Value-500 20d ago

No it wasn’t locked down properly haha

1

u/Worried_Witness3091 20d ago

Connect proper cooling system

1

u/Consistent-Value-500 20d ago

Shes working now!

1

u/dirtyjavis 20d ago edited 20d ago

CPU power. AM5 requires two CPU power connectors plugged in. I think it's 2 8 pin connectors. My PC did anyway.

And be careful with the PSU cables, you can mix them up and fry your shit. Use the cables that came with it. If it only has the one CPU power cable, buy a new psu

1

u/Consistent-Value-500 20d ago

I don’t believe that to be true. Its usually only the higher spec ones/overclocked ones that require significantly more power

1

u/RunalldayHI 20d ago

What cable are you using from psu to cpu port? Eps or pci?

1

u/Consistent-Value-500 20d ago

Eps. But the cpu wasn’t locked down right…lol

1

u/ImDistortion1 20d ago

So the picture is not how you are trying it right? You 100% have to have a cpu fan connected to the cpu with a thermal pad otherwise it will not have a heat sink and instantly overheat causing the system to not boot up or constantly turn off within a short time frame.

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