My Z490 has this problem, had it from day one. It comes and goes, super annoying but doesn't break the system. 
 
 
 

 
I'll add to this. Had the exact same thing happen on my Z490 Dark Kingpin - the motherboard worked great, but the first digit on the post code (which is actually the 3rd position on the display) was not displaying correctly - like others have experienced, it faded out and was pretty much impossible to tell what the first digit in the code being displayed was. I very recently RMA'ed it, only because I want to sell the motherboard, and it's not helpful having a post code display that doesn't work.
 
Minutes ago I noticed my Z590 Dark suddenly started doing the exact same thing, in the same position on the LED post code display, again almost fully faded out. The Z590 Dark is working fine other than the display code, so I'll probably wait until my next motherboard to RMA it since it's a water loop and a pita to tear down.
 
This is clearly an ongoing problem.
 
I'll add that I have had many motherboards from EVGA in the past ~12 years and never experienced this issue, it's only the Z490 Dark KP and the Z590 Dark. I also have a Z590 FTW sitting here in a box ready to sell but that one is working fine (or at least it was when I last used it a few months ago). Sounds like they got a crappy batch of LED displays from somewhere.
 
 

CyberbrainPC
My Z490 has this problem, had it from day one. It comes and goes, super annoying but doesn't break the system. 
 
 
 

 
I know doesn’t it suck? it’s unfortunate because we want the item to work. But sending the whole motherboard to EVGA, tearing down the whole system just to potentially get another board that might fail too. Evga should replace all board that had post code failure for free. 

tps34433

CyberbrainPC
My Z490 has this problem, had it from day one. It comes and goes, super annoying but doesn't break the system. 

I know doesn’t it suck? it’s unfortunate because we want the item to work. But sending the whole motherboard to EVGA, tearing down the whole system just to potentially get another board that might fail too. Evga should replace all board that had post code failure for free. 

I can confirm that it does suck tearing the system down and replacing the board for this, but it is fully covered under warranty. There was collateral for cross-ship (twice in my case due to a separate issue with the first replacement sent), but that was returned, so yeah...fully covered.
 
I just hope they figure out what it is and get it sorted ASAP. I imagine the only reason it hasn't hit them incredibly hard is that a lot of people won't RMA a board just for that.

B0baganoosh
*snip*
I imagine the only reason it hasn't hit them incredibly hard is that a lot of people won't RMA a board just for that.

Yup. I only RMA'ed my Z490 Dark KP because I'm going to sell it. I even felt a little guilty putting in a RMA request for something so seemingly minor, but that was before I saw this thread, and before my Z590 Dark did the same thing. The 1st character of the post code display on my Z590 Dark is now nothing but a faded 'u' shape at the top half of the character, the bottom half is dead. The 2nd character is still working though.
 

I am having that same issue with the first number the top middle and bottom segment have gone almost out contacted support they said RMA is the only fix not sure what they do but cant afford to have pc down for 3 weeks with shipping times they said it would only take a few days I think they just replace the display they asked if I wanted to start the RMA take a picture of the socket. Just cant be down that long thought about just buying a cheap board then returning it when this FTW Z590 comes back 

I got mine in the earliest release on 6/1/2021 and having the same issue 

the question is:  does it really matter if the motherboard is running great?
 
its annoying, but I wouldn't tear down and RMA for this.
 
will the RMA replacement have the same issue?
 
 

rblaes_99
the question is:  (1.) does it really matter if the motherboard is running great?
 
its annoying, but I wouldn't tear down and RMA for this.
 
(2.) will the RMA replacement have the same issue?

 
1. Depends on how you're using it and whether you are doing regular testing that is close to the edge of stability. If so, the POST code is helpful. That said, it is not at all necessary for proper operation of the system and the LED failing isn't going to cause any other problems.
 
2. Probably, unless they've figured it out and fixed it, all their motherboards will have a chance of this issue now. It has been reported across z490, z590, and x570 boards...so it's something they used on every board. They didn't used to have this problem and it sounds like the original z490's didn't have this problem, so something changed and is an issue now. Probably just a bad batch of LEDs, but there are other options that I've put out there above (and in another thread lol) as possibilities. We won't know unless they say something. At this point, I've counted 25 boards, mostly in this thread, but also in z490 and x570 threads, that have had this issue, so they have to know about it and I would think they'd be investigating.
 
Your statement about not wanting to tear down the build because of this is the only reason they might not know how bad it is. For their sake, I'd think they'd want to get right on it though because a lot of people will likely do what Nereus has suggested and RMA it right before they plan to sell it as long as it is still within warranty. EVGA will lose a good chunk of money from these LEDs being bad so I can't imagine that wouldn't motivate them to fix it going forward.

here to report my z590 FTW has this LED defect too, it's annoying af and not the kind of quality I would expect from a $400 plus mobo. 

The BIOS seems **** too, replaced the cmos battery twice and still get random messages about PCIe, CPU Changed, Memory Changed, Storage Changed etc.  Ignore the messages and boot windows and PC runs/works/games fine. 

Might RMA to get out from under this board and go another direction.