Question Full rebuild, same issue

[AtNvme]

Greetings,

My friend's PC suddenly seems to have stopped working after having similar, but lesser issues for a while.
It seems it always had issues booting up, leaving an infinite black screen after startup (no BIOS), but those issues would simply go away and happen rarely.
This time, it seems it had given up completely, and so we completely rebuilt, going from AM4+ to LGA 1511 (Z390 with i5-9700k) and 16GB of DDR4 RAM.

After installing all of the new parts, the issue kept happening. The exact same thing, then we thought, knowing the GPU wasn't the issue from trying to boot using CPU graphics and having the same result, the only other option would be a bad cable/PSU.
We then changed that and the issue was still there. We tried a different set of WORKING RAM and nothing.

At this point I suspect DOA (dead on arrival) parts and do not exclude the possibility of a manipulation error, but would it be possible I am missing something?

Here are the exact specs for compatibility check purposes:
CPU: i5-9700k
MOBO: MSI MPG Z390 Gaming Plus
RAM: 16GB Corsair Vengeance 3000Mhz (8x2) (they are in the correct slots)
GPU: MSI RX 580
PSU: EVGA 750W G3

 

[Bearmann]

What about the monitor? Have you tried a different monitor with different cables?

Did you use the MB stand offs?

 

[AtNvme]

What about the monitor? Have you tried a different monitor with different cables?

Did you use the MB stand offs?

I've tried on multiple monitors, yes.

I'm not sure what you mean by MB standoffs.

 

[Bearmann]

I've tried on multiple monitors, yes.

I'm not sure what you mean by MB standoffs.

When you screwed the motherboard on to the case, did you insert those risers (standoffs) first so that the motherboard is not touching the case but is elevated above it by a centimeter or so?

 

[AtNvme]

I have not. Are those supposed to come with the board?

 

[Bearmann]

I have not. Are those supposed to come with the board?

They should come with your case. They keep the case metal from touching and shorting out the motherboard.

 

[SgtScream]

Did you every try a clean install on the system drive or for the new build?

 

[hang-the-9]

I've tried on multiple monitors, yes.

I'm not sure what you mean by MB standoffs.

If you did not know what the standoffs were, you may want to have another person check over the system. Those are one of the basic computer setup parts, it would be like a mechanic forgetting to put the spark plugs back in an engine after working on it or something. I would guess it was a build issue or a part you did not check like the power supply.

 

[AtNvme]

If you did not know what the standoffs were, you may want to have another person check over the system. Those are one of the basic computer setup parts, it would be like a mechanic forgetting to put the spark plugs back in an engine after working on it or something. I would guess it was a build issue or a part you did not check like the power supply.

English is not my first language, hence why I didn't know what standoffs were, it's not my first time building a PC. If one said "motherboard supports" I would've known.
Either way there were no standoffs included in anything I've received. The old motherboard did not have any installed, but perhaps I should buy some?

Did you every try a clean install on the system drive or for the new build?

As for this, that's not the issue. The PC doesn't post, at all. I can't get into the BIOS.

EDIT: I've also had my computer technician friend over to have a look, and he did not see anything wrong.
EDIT2: As for the PSU, as I said, it is brand new, and seems to work just fine.

 

[SgtScream]

Check the diagnostic led on the motherboard. Which one is lit when you attempt to post?

 

[AtNvme]

Check the diagnostic led on the motherboard. Which one is lit when you attempt to post?

It's flicking back and forth between DRAM and CPU at a constant rate, staying on DRAM longer.

 

[SgtScream]

It's flicking back and forth between DRAM and CPU at a constant rate, staying on DRAM longer.

Now look that up in the manual.

 

[AtNvme]

It means DRAM and CPU are "not detected or fail". I would assume this is a motherboard issue, unless we somehow got 2 disfunctional parts out of 3?
We've tested working RAM with same result.

 

[SgtScream]

Try ram in different slots and reseating the processor.

 

[AtNvme]

Try ram in different slots and reseating the processor.

We've tried different slots, only using 1 of the 2 ram sticks (with both / in both slots) and with a completely different set.

 

[AtNvme]

Figured it out, it's a broken socket pin.

Yikes.

Would that cause the DRAM debug light to turn on though?

 

[Deleted member 14196]

Yeah