Red CPU EZ debug light! - B650 Tomahawk with R7700x cpu

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mapsmit0fbb026b

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Hi, cant get my new pc build to boot - I cant get past the red/amber lights on the EZ Debug!
Build is AM5: B650 Tomahawk Wifi, CPU: Ryzen 7 7700x, DDR5 ram: kingston Fury Beast, Arctic Liquid II AIO ARGB
I've gone through a few hours of debugging already ... but no success; I've checked all power connections, refitted CPU - all good, no bent pins, DDR5 sticks are in A2 and B2 slots (and clicked), AIO is plugged into CPU_FAN1. All argb lights, fans work and USB3 powers up. Ive tried with/without GPU (NVidia RTX3080). Ive cleared the CMOS (pulling out the battery and waiting), I've flashed the BIOS (button at the back) .. now on version 7D75v12 ... anybody have any other troubleshooting ideas?
 
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I realized that I've made a critical mistake (sorry, first time building a PC!)
I didn't connect PSU to CPU_PWR... Welp, you can add that to a "troubleshooting" list, I guess.
Now integrated graphics work at least, will check GPU tomorrow.
(UPD: it works! Also yeah, I had to wait like 1-2 minutes when I interested a second RAM stick, it was scary)
 
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Yeah, hehe, it'll be difficult to run it without that cable (at least one 8-pin)... the CPU VRM (voltage regulator module) and thus the CPU exclusively get powered via CPU_PWR, the 24-pin ATX cable is just for everything else that's on the board.

Here, you can check this guide to see if you missed anything else:

 
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Sorry for the late reply,
I could fix the problem with RED/Yellow debug light being on for about a minute by disabling some setting in the UEFI that is related to RAM checking. After disabling this setting, the board boots almost instantaneously.
I do not have access to the computer at the moment, so I cannot check which setting it is. But when I have access again, I'll post it here.

martin.lipinsk15b502e8 said:
Hi,
i have a similar problem. MB is the PRO B650-P Wifi with Ryzen 7950x, 2x 32GB Corsair Vengeance 5200 Mhz RAM. When I start the machine, CPU & DRAM lights light up for about 1 minute. Then they both switch off and the system boots and works without any issues. After each Power Off/On the lights are on again, so every boot takes > 1 minute.

I flashed the latest BIOS 7D78v12 but that didn't help. Tried both DRAMs alone -> no difference.
If no ram is plugged, CPU and DRAM light are both on.
No difference if I use the internal GPU or an external GPU.

Any help would be appreciated.
Click to expand...
 
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martin.lipinsk15b502e8 said:
Sorry for the late reply,
I could fix the problem with RED/Yellow debug light being on for about a minute by disabling some setting in the UEFI that is related to RAM checking. After disabling this setting, the board boots almost instantaneously.
I do not have access to the computer at the moment, so I cannot check which setting it is. But when I have access again, I'll post it here.
Click to expand...
Yes please do and share screen shots of the bios setting, please
 
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t3resgame15e802ed said:
I realized that I've made a critical mistake (sorry, first time building a PC!)
I didn't connect PSU to CPU_PWR... Welp, you can add that to a "troubleshooting" list, I guess.
Now integrated graphics work at least, will check GPU tomorrow.
(UPD: it works! Also yeah, I had to wait like 1-2 minutes when I interested a second RAM stick, it was scary)
Click to expand...
I also had the same issue with my motherboard. Last night I just built my new PC for the first time. Everything turns on, fans spinning and full of life but with a red CPU light and DRAM orange light. I only have one 12gb RAM stick installed in the 2nd slot on the motherboard. I tried it on the first slot but it didn't make any difference. I checked my 12v 8-pin CPU power connectors but noticed that I have 2 8-pin CPU ports. There's the CPU-1 then on the right of it is another 8-pin labeled as CPU-2. The thing is, I realized that I'm missing another 8-pin for the CPU port from my 500w power supply. It seemed as though it doesn't come with duo 8-pins so I just plugged in the only one I had into the CPU-1 port. I made sure it wasn't the PCI chord and that it is definitely a CPU one. I still get the red CPU light and can't plug any USB cables in. No display at all but every now and then when I turn the PC on, my monitor screen will turn on but then say no signal then black again. I'm wondering that it may be the fact that my CPU isn't getting enough power and that it requires BOTH 8-pin connectors to be plugged in? But part of me feels like it still should work just fine. I really need some answers here because I must've spent 8 hours figuring this out and losing sleep over it. I spent probably $1200 on all of this with no warranties I believe so... yeah. My Specs are:

- MSI MAG B650M Mortar Wifi motherboard
- 2 16gb Vengeance Ram sticks
- 2tb NVME SSD
- Cooler Master Hyper 212 Black Edition
- Smart 500w Thermaltake
- AMD Ryzen 9 7950x CPU
- AMD Radeon RX 6700XT Challenger Graphics Card
- Cooler Master TD500 Mesh
16798688961556939663394756041836.jpg
 
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noahd8315f902ea said:
- Smart 500w Thermaltake
Click to expand...

Total mismatch with your CPU and GPU. With the "Thermaltake SMART" series, there are mediocre low-end models (Smart BM2), really bad low-end models (Smart SE / BX1 / BM1) and extremely bad low-end models which can pose a danger (Smart 80+ RGB / 80+ White). Furthermore, the rated wattage is not adequate for your components.

So this PSU definitely needs to be replaced with something both better and more powerful, see my Guide: How to find a good PSU. Having said that, for a PSU-only fault, just the "CPU" LED would be more characteristic. If you get CPU+DRAM LEDs, it might be more of a sign of bent pins in the LGA socket. So not only replace the PSU (this i would do without a doubt, before doing any further testing), but also take out your CPU and carefully inspect the socket pins for any bent pins. Use a magnifying glass or take macro photos. If you find bent pins, upload photos of the damage.

About the CPU_PWR headers: For the CPU to get powered, only one 8-pin EPS12V connector is necessary. The second header is there to spread the total power distribution over two plugs and two cables, in order to prevent the cables or plugs from heating up too much when you have a CPU with a very high power draw. Meaning, useful for a high-end CPU and/or overclocking (which is not advised anymore with current CPUs). The headers combine again on the PCB and feed the CPU voltage regulator module.

When you connect two 8-pin cables (only with individual cables, not daisy-chained plugs on one cable), it will essentially double the cable cross-section, so twice the amount of current can be safely conducted. And of course, the less current conducted per cable, the less chance of the cable or plug heating up too much with high power draw. Rule of thumb: If your PSU has two cables, connect both. But this is not related to your problem, or rather only indirectly, since you cheaped out too much on the PSU quality and wattage.
 
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martin.lipinsk15b502e8 said:
MB is the PRO B650-P Wifi with Ryzen 7950x, 2x 32GB Corsair Vengeance 5200 Mhz RAM. When I start the machine, CPU & DRAM lights light up for about 1 minute. Then they both switch off and the system boots and works without any issues. After each Power Off/On the lights are on again, so every boot takes > 1 minute.
Click to expand...

For me the solution was to set "Memory Context Restore" which you find under Overclocking (see screenshot) to enabled. This fixed the issue with the debug lights completely and the system turns on just as it should. It's completely reproducible: switch it off and the DEBUG lights stay on for about a minute.

Hope this helps somebody.
 

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martin.lipinsk15b502e8 said:
For me the solution was to set "Memory Context Restore" which you find under Overclocking (see screenshot) to enabled. This fixed the issue with the debug lights completely and the system turns on just as it should. It's completely reproducible: switch it off and the DEBUG lights stay on for about a minute.

Hope this helps somebody.
Click to expand...

I tried this with my MPG B650I Edge Wifi Gaming motherboard as I was having the same issue, unfortunately it has not fixed the issue, so I have submitted a ticket.
 
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I have the same issue: Red and Yellow solid debug lights.
Hardware list:
MB: MAG X670E TOMAHAWK WIFI
CPU: AMD Ryzen 7 7800X3D
RAM: G.SKILL Flare X5 64GB (2 x 32GB) 288-Pin PC RAM DDR5 5600 with EXPO
PSU: EVGA SuperNOVA 850 GT
Here is what I've attempted so far:
Removed all components: GPU, SSD, Keyboard, Mouse, Ethernet, Front Audio panel, front USB
Removed all PSU connections and only reconnected MB + CPU1 and CPU2
Update BIOS with Flash BIOS Button: I believe I have flashed to the latest BIOS - 7E12v133(Beta version) - 2023-04-28 - The Red light blinking in the back plus USB read light for about 6 minutes, then it power cycled and came back up no-post RED / Yellow light.
Reseated CPU x3; no visible damage to pins or CPU
Used only one stick of RAM at a time in the DIMMA2 slot
Monitor plugged to MB HDMI
 
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aguilo1159f02e7 said:
I have the same issue: Red and Yellow solid debug lights.
Hardware list:
MB: MAG X670E TOMAHAWK WIFI
CPU: AMD Ryzen 7 7800X3D
RAM: G.SKILL Flare X5 64GB (2 x 32GB) 288-Pin PC RAM DDR5 5600 with EXPO
PSU: EVGA SuperNOVA 850 GT
Here is what I've attempted so far:
Removed all components: GPU, SSD, Keyboard, Mouse, Ethernet, Front Audio panel, front USB
Removed all PSU connections and only reconnected MB + CPU1 and CPU2
Update BIOS with Flash BIOS Button: I believe I have flashed to the latest BIOS - 7E12v133(Beta version) - 2023-04-28 - The Red light blinking in the back plus USB read light for about 6 minutes, then it power cycled and came back up no-post RED / Yellow light.
Reseated CPU x3; no visible damage to pins or CPU
Used only one stick of RAM at a time in the DIMMA2 slot
Monitor plugged to MB HDMI
Click to expand...
How long are you waiting for it to post
 
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After the steps taken, I have not let it go too long, maybe 40 seconds or a bit more. When I first put it together like two minutes while I figured out what the red and yellow light was. Do you recommend multiple minutes with the Red/Yellow debug light on?
 
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Alan J T said:
How long are you waiting for it to post
Click to expand...

Thank you for taking the time to respond. I have assembled dozens of computers with hundreds of upgrades, but I built the last one in 2018. I guess I was not up to snuff on DDR5 memory profiling. To MSI, add a ******* light that shows something other than your CPU and Memory are not detected while it is doing that process. Or explicitly state RED and Yellow is a memory test state.
 
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aguilo1159f02e7 said:
After the steps taken, I have not let it go too long, maybe 40 seconds or a bit more. When I first put it together like two minutes while I figured out what the red and yellow light was. Do you recommend multiple minutes with the Red/Yellow debug light on?
Click to expand...
Oh yes I would say 5 minutes if not posted them that try a hard reset

I only just previously posted the info

1683890645597.png
 
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