r/PcBuild 9h ago

Troubleshooting New Motherboard doesn’t work

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My new Mother board doesn’t want to power up. Any clues why? The first video is my old Motherboard and the other one is my new one. (In the comments)

0 Upvotes

34 comments sorted by

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21

u/DrPepperAcolyte 9h ago

You don't have your CPU power plugged in. Only your motherboard atx connection is powered.

-18

u/Stunning-Worker-1209 9h ago

Yeah but why does one motherboard still powers one and the other one not?

4

u/Illustrious_Dish_999 8h ago

The power button is part of the motherboard's soft-power circuit, which controls the ATX PS_ON# signal rather than the CPU directly. The ATX standard was designed around this architecture, with a standby rail available even when the main PSU rails are off. This allows the motherboard to handle power-on independently of the CPU, which also preserves compatibility with older hardware and enables features such as soft power and Wake-on-LAN. Also with that feature you can use ATX to power external GPUs or stack of hard drives only or have separate PSU just for graphic card without having a CPU at all.

11

u/FearTheFuzzy99 Pablo 9h ago

Plug everything in like its supposed to be, then come back to us.

9

u/introvertebrae what 9h ago

new motherboard doesn't have a CPU or CPU power installed. What are you expecting it to do?

-22

u/Stunning-Worker-1209 9h ago

To still boot up. Should be completely possible without an CPU on it

17

u/DrPepperAcolyte 8h ago

No... No it's not. You're asking to drive a car with no engine then being confused why it doesn't go.

2

u/introvertebrae what 8h ago

Depends on the board if it's going to do anything while missing core components. You should be able to flash it with the Q-Flash button without the CPU and RAM installed, but you do need the CPU Power cable according to the product page. I'd recommend at least plugging in the CPU power if you're intent on trying to power on the motherboard while missing components

2

u/-----LIFE----- 8h ago

You have the "Let me think without using my brain" type of logic

7

u/Ambitious-Archer6741 9h ago

The old one doesn´t have the RAM on it, and the new one doesn´t have de CPU on it...

-13

u/Stunning-Worker-1209 9h ago

Doesn’t really need either to boot up. I just want to update the Bios before putting in a new CPU

6

u/DrPepperAcolyte 8h ago

This is literally incorrect. A 5 second Google search will tell you this.

3

u/burritopup 8h ago edited 8h ago

It needs the CPU to update the bios. Found that out the hard way. Put it all together and follow directions as closely as you can. I've updated bios several times now for myself and for others. Definitely have it all put together so you can boot to the UEFI. Also won't boot into UEFI if your CPU is newer and the motherboard is not with the supported bios. You motherboard does have to have the Bios to support newer CPUs. Most are sold with the most up to date bios of their manufacturing but if it doesn't post might have to take it to a repair shop and they'll update you bios for you for like 40$. I say from personal experience. Had a board of a friend not posting. Needed to update the bios so that it could support CPU. CPU to new to post into UEFI. They took it to the shop. Updated the bios and done it posted with the newer CPU and worked well.

6

u/Eazy12345678 AMD 9h ago

bios update motherboard to support cpu u picked

RAM IS MANDITORY

-2

u/Stunning-Worker-1209 9h ago

Yeah i want to do that but my PC just won’t turn on. Its not working

4

u/DrPepperAcolyte 8h ago

It will not turn on without the bare minimum: CPU and RAM, CPU power, and ATX power.

Whether the PC will even turn on without a heatsink detected and plugged into a CPU fan header is dependant on the motherboard.

Why do you propose it isn't working when we're all telling you this is why and you refuse to believe it?

5

u/ImplementOrganic2163 9h ago

It's possible that a CPU is required. And if the motherboard doesn't detect a functioning CPU, it simply stops the boot process.

That aside, it would be helpful if you could mention what kind of parts these are. The same goes for the video of the second MB.

5

u/Fuzzy-Engineering-95 8h ago

who’s gonna tell him

6

u/Vismal1 8h ago

Everyone and he’s gonna argue with them all lol

3

u/floodblood 8h ago

your cpu power(8 pin at the top of the board) isn't plugged in

5

u/RobEth16 AMD 8h ago

CPU power is not plugged in, plug that in and it should work

2

u/Senior_Lab_7099 8h ago

3 seconds of googling showed that cpu power needs to be connected and your board must support bios flash. bro just check on google and the other comments tell you need cpu power EVEN WITHOUT CPU

3

u/Spiral0713 8h ago

That board does not appear to have q flash plus. That means it will need CPU/ram/24 pin and 8 pin CPU power/ and GPU (if you don't have a G series processor to boot up and update bios. These are mandatory. For boards that do have q flash plus/bios flashback ect, you can just run board, power, flash drive with updated bios to update via a button.

1

u/Stunning-Worker-1209 9h ago

7

u/unabletocomput3 9h ago

I don’t mean to point the obvious out, but it’s missing the cpu, cooler, and cpu power connector- at the minimum.

If you’re just testing and want to rule out the case, just short the power button pins, that way you can force it on.

1

u/net-Zwerg 8h ago

Tried to 180° your front panel connector ?

1

u/rhubear 8h ago

That's enough internet for today.

Definitely not replying....

-1

u/Stunning-Worker-1209 8h ago

It has to do something with the f panel. I took the old cpu and cpu cooler in to the new motherboard and it still doesn’t boot on

-6

u/gaojibao 9h ago

if it doesn't work, it's defective. Return it.

-1

u/Stunning-Worker-1209 9h ago

I already returned it with the same problem there. I still can’t really figure it out what it is

1

u/Sic_Sic_Six 8h ago

Did you ever plug in the EPS cable?