Question New build powers up then shuts down + no display

[Aliceinchains123]

My PC died this week, it was around 5-6 years old, specs weren’t too bad i5 4590, 16GB ddr3, 1060 6gb etc

I bought some new parts and did mostly a fresh build yesterday
i5 9400F
Asrock b365 pro4
1x16gb ddr4
Seasonic modular psu 550w
coolermaster 103 evo
Be quiet case
WD blue 240gb ssd

I kept the rest of the parts including boot drive as I didn’t want to start windows over again, as I have a lot of programs installed. Parts I reused:
1060 6gb
Samsung 840 120gb ssd (old windows boot drive)
2x seagate HDD
Tp link wifi pci
Dvdrw

I started up the PC and it seemed to work fine however after maybe 20 seconds it turned off restarted. Tried a few times and kept doing the same thing. Took the ram out but didn’t make a difference. I also noticed nothing was displaying, not even the motherboard startup screen.

I’m guessing CPU, mobo or PSU? I know the old GPU is fine. I was pretty careful installing the CPU. Mucked up the thermal paste a little, I did an ‘x’ but one of the legs of the x went to the middle but it seemed fine to me.

I guess I can try the old PSU otherwise maybe cpu or mobo is faulty? I built my last PC it worked perfectly the first time.

 

[Steltek]

Can you tell from the box what BIOS is installed on the motherboard? The B365 Pro 4 needs at least BIOS P4.0 to support the i5-9400F.

EDIT: There should be sticker on top of the BIOS chipset on the motherboard which shows what BIOS was installed at time of manufacture. If it is less than P4.0, that is definitely your problem.

If the correct BIOS is installed, it wouldn't hurt to try the old PS with the new board - just set it up outside the case and plug everything in to test it.

 

[Aliceinchains123]

Can you tell from the box what BIOS is installed on the motherboard? The B365 Pro 4 needs at least BIOS P4.0 to support the i5-9400F.

EDIT: There should be sticker on top of the BIOS chipset on the motherboard which shows what BIOS was installed at time of manufacture. If it is less than P4.0, that is definitely your problem.

If the correct BIOS is installed, it wouldn't hurt to try the old PS with the new board - just set it up outside the case and plug everything in to test it.

Looks like P1.00 lol. I was actually wondering what that sticker was. So this would explain it?

How do I update it?

edit: here it says all b365 pro4 versions support 9400f

ASRock > CPU Support List

www.asrock.com

 

[Steltek]

Yes, that is definitely your problem. If you click on the B365 Pro 4 in that table, it takes you to another table which specifies that you need BIOS P4.00 or later to support the i5-9400F CPU.

EDIT: There are multiple steppings of the i5-9400F shown in the table. Some (steppings U0 and P0) are compatible out of the box with BIOS P1.00, while stepping R0 requires the BIOS P4.00 to work. Without knowing specifically what revision of the i5-9400F you have, it isn't possible to tell if this is the issue. Check the CPU box and see if it tells you in the product coding whether your stepping is U0, P0, or R0.

If you have a stepping R0, you might want to try to trade it for a U0 or P0. Failing that, you'd need to borrow a compatible processor to flash the board to accept the R0 CPU. Asrock will probably swap the board for you under warranty with one that will work, but you never know what shape the board you get back will be in (i.e new or used).

 

[VirtualLarry]

Interesting. I bought (in the past) an ASRock B365 Pro4 ATX board, and an Intel i5-9400F combo from Newegg. I never dreamed that they wouldn't work together. Guess I'm going to have to check my board. Sigh.

 

[Steltek]

There were issues with the R0 steppings and Windows 10 that required BIOS updates to prevent crashes back in March when they were released.

I read somewhere (I don't recall exactly where) that the R0 steppings include some architecture adjustments to mitigate some variants of the Spectre/Meltdown vulnerabilities in Intel's chips, and that it was those adjustments that required a BIOS upgrade.

 

[Aliceinchains123]

Yes, that is definitely your problem. If you click on the B365 Pro 4 in that table, it takes you to another table which specifies that you need BIOS P4.00 or later to support the i5-9400F CPU.

EDIT: There are multiple steppings of the i5-9400F shown in the table. Some (steppings U0 and P0) are compatible out of the box with BIOS P1.00, while stepping R0 requires the BIOS P4.00 to work. Without knowing specifically what revision of the i5-9400F you have, it isn't possible to tell if this is the issue. Check the CPU box and see if it tells you in the product coding whether your stepping is U0, P0, or R0.

If you have a stepping R0, you might want to try to trade it for a U0 or P0. Failing that, you'd need to borrow a compatible processor to flash the board to accept the R0 CPU. Asrock will probably swap the board for you under warranty with one that will work, but you never know what shape the board you get back will be in (i.e new or used).

Would you be able to check for me? As I have no computer and it doesn’t seem to be working on my phone
Instructions:

How do I find the stepping of my Intel® Core™ i5-9400F...

How to locate processor stepping

www.intel.com

Attached photo of box (blacked out s/n)

 

[Aliceinchains123]

Looks like it’s stepping U0.

ill try the old PSU at least. Any other ideas?

edit: tried old PSU. Looks like it’s either CPU or mobo. Maybe a faulty part... what do I do? Take them both back?

 

[Steltek]

In my experience, of the two, it is more likely to be the motherboard than the CPU. As a result, if it were me, I'd try swapping the motherboard first.

Depending upon where you bought the board, if they will accept the return and swap it as defective this would be preferable to dealing with Asrock customer support.

 

[Steltek]

The only other thing I can think of would be an incompatible memory module. Also, did you happen to try the module in another slot by any chance?