Question Desktop PC is in a non-booting condition ?

[sycotic]

Prebuilt Desktop PC: ASUS GA15DH-AH772

Specs
Ryzen 7 3800X
16G DRR4
GeForce RTX2070S 8GB
512GB M.2 SSD
1TB SATA

There's a single orange light placed right next to the graphics card that lights up when the PSU is switched on, but no other components power up.

I tested the PSU with a multimeter while it was attached to the mainboard via the graphics card power connectors I got nothing, so I assumed PSU failure. Problem is, when I pull the mainboard power connector from the board, short pins 16 and 17 on the connector and power on the PSU, I see the CPU, graphics card and 1 TB drive powering on. Tested again the same way but with graphics power disconnected and I get the correct voltages from those connectors.

I'm thinking something's wrong with the mainboard itself - but looking for confirmation from experts. I'm kind of at a loss as to what to try next. I can't find a decent motherboard manual at the ROG site for this machine, so I'm not sure if I'm testing the power switch pins correctly, but I tried that as well. I tried shorting them to see of maybe the power switch was somehow at fault.

 

[Aeacus]

There's a single orange light placed right next to the graphics card that lights up when the PSU is switched on, but no other components power up.

Dead GPU.

To confirm that, try with 2nd, known to work GPU.
Since you have Ryzen 3000-series CPU, it doesn't have iGPU in it, making dedicated GPU a must to power on and see the image.

I tested the PSU with a multimeter while it was attached to the mainboard via the graphics card power connectors I got nothing, so I assumed PSU failure.

When GPU has a fault and PSU catches it, PSU will not power on. Else-ways, you'd get short circuit and at worst, actual fire out of the GPU.

Now, i could not find info about the PSU in that prebuilt. But given that it is 500W, indicates older platform, which, in turn, isn't something good. Modern PSUs have their wattage rating at x50W, e.g 550W, 650W, 750W.
So, if you have time, can you open up the PC, take the PSU out and take a pic of the label on the PSU? (That shows rails amps and watts.) Since with that, i can look up if PSU would be suspect as well. E.g if it's low quality, then could be that PSU killed the GPU. And new PSU would be in order as well. But if it is good quality, could be that GPU died on it's own.
You can upload the PSU label image to e.g www.imgur.com and share it here.

 

[sycotic]

Tried known good GPU. Same result.

The PSU is a Great Wall NZXT E500 80 Plus Gold 500W modular PSU.

 

[Aeacus]

The PSU is a Great Wall NZXT E500 80 Plus Gold 500W modular PSU.

NZXT E500 is good quality PSU. It uses Seasonic Focus platform. So, it being PSU issue, is slim.
It then would leave that the GPU died on it's own.

 

[sycotic]

NZXT E500 is good quality PSU. It uses Seasonic Focus platform. So, it being PSU issue, is slim.
It then would leave that the GPU died on it's own.

I'm not sure the GPU is the problem. A known good GPU produces the same result as the factory GPU. Moreover, as stated in the post, if pins 16 and 17 are shorted and the PSU is powered on with the backplate switch, the GPU fans spin and all the pretty colors on the card itself fire.

 

[sycotic]

I'm not sure the GPU is the problem. A known good GPU produces the same result as the factory GPU. Moreover, as stated in the post, if pins 16 and 17 are shorted and the PSU is powered on with the backplate switch, the GPU fans spin and all the pretty colors on the card itself fire.

Also, let me add this fun little spin - this machine is brand new. I'm the second person to have unboxed it, the owner being the first.

The owner, however, has had the machine for over 2 years now so it's out of warranty.

 

[Aeacus]

I'm not sure the GPU is the problem. A known good GPU produces the same result as the factory GPU.

Then it is the issue of: CPU, MoBo or RAM. Or all three are dead.

Moreover, as stated in the post, if pins 16 and 17 are shorted and the PSU is powered on with the backplate switch, the GPU fans spin and all the pretty colors on the card itself fire.

Jumpstarting the PSU still doesn't make the system POST. So, something else is dead.

You can try with 2nd, known to work, good quality PSU if you like, but i'm sure you'd get the same result as with NZXT E500.

Also, let me add this fun little spin -this machine is brand new.

The owner, however, has had the machine for over 2 years now

Looks like we have a vastly different understanding what is "brand new".

No matter how i look at it, your prebuilt PC is used and not brand new. If it were brand new, you'd be holder of the warranty and can do a warranty claim. But since you bought this prebuilt PC as used PC, it is not brand new.
Moreover, used hardware is sold "as is" and there is 0 expectation for it to work like brand new hardware.

Easiest fix is to haul it to PC repair shop and pay for diagnostics.
But if you want to troubleshoot it on your own, then you need 2nd, compatible system, where to test out, individually; CPU, RAM and MoBo. To see if any of the components, individually, will work in known to work compatible PC.
MoBo is usually 1st one to die. But you can have bad RAM or CPU as well. And without actual testing in compatible system, you can't say for sure which of the components is dead (if not all three).

When you bought this used prebuilt, did it come with the issue? Or were you able to boot to OS and use it a bit?

 

[sycotic]

Then it is the issue of: CPU, MoBo or RAM. Or all three are dead.


Jumpstarting the PSU still doesn't make the system POST. So, something else is dead.

You can try with 2nd, known to work, good quality PSU if you like, but i'm sure you'd get the same result as with NZXT E500.



Looks like we have a vastly different understanding what is "brand new".

No matter how i look at it, your prebuilt PC is used and not brand new. If it were brand new, you'd be holder of the warranty and can do a warranty claim. But since you bought this prebuilt PC as used PC, it is not brand new.
Moreover, used hardware is sold "as is" and there is 0 expectation for it to work like brand new hardware.

Easiest fix is to haul it to PC repair shop and pay for diagnostics.
But if you want to troubleshoot it on your own, then you need 2nd, compatible system, where to test out, individually; CPU, RAM and MoBo. To see if any of the components, individually, will work in known to work compatible PC.
MoBo is usually 1st one to die. But you can have bad RAM or CPU as well. And without actual testing in compatible system, you can't say for sure which of the components is dead (if not all three).

When you bought this used prebuilt, did it come with the issue? Or were you able to boot to OS and use it a bit?

I appreciate all your efforts, but it seems you haven't read the post carefully enough. E.g., (1) I didn't buy the machine, (2) indeed, I understand it's not the GPU (I already said that), thus it must be something else.

A little more expanded view of the story. This forum wouldn't let me post all of it, i.e., it complained my post was "too long."

https://rog-forum.asus.com/t5/gaming-desktops/help-with-ga15dh-non-boot-condition/td-p/1107587

Not trying to be rude! Thanks again for your effort. All the best!

 

[Aeacus]

(1) I didn't buy the machine

It still doesn't matter for the troubleshooting purposes if you got it for free (donation, stealing what-not).

thus it must be something else.

As i said, CPU or MoBo or RAM. Or all three.