Intermittent solid yellow light after reboot or solid red & yellow light during new boot - MAG B650 TOMAHWAK WIFI

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alexinvancouve15b802e5

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Problem started a few weeks ago, PC would refuse to boot with ezdebug solid red & yellow lights on. Problem goes away randomly after numerous power-off and power-on. Similar issue when restarting after a successful boot but only intermittently. Just a bit odd that this issue is showing up after 15 months of working just fine.

Attempted steps resolve issues include:
    1. - Update bios to latest version (E7D75AMS.1M0)
    2. - Unplug power to Video Card
    3. - Remove entirely, or rotate ram 1 at a time (also made sure rams are inserted to slot 2 & 4)
    4. - Unplug and re-plug all power cords to PSU to ensure connections are secured
    5. - Unplug and re-plug all cords and cables to motherboard
    6. - Tried a different PSU cord
    7. - Tried changing RAM profile from EXPO-2 (6000) to EXPO-1 (5600)
    8. - Took out & cleaned cooler, removed and re-secured CPU, re-applied thermal paste...

  3. So, I'm really out of ideas at this point. Tempted to throw in the towels and bring PC to a local PC retailers for additional troubleshooting. Just wondering if folks have any other ideas or examples of similar problem, appreciate it.
1 wild-card thought... The reset button on my Lian Li case never worked, could it be wiring issue with the Power | Reset button?

  1. SPECS:
  2. - AMD Ryzen 7 7700X
  3. - MSI MAG B650 Tomahwak wifi
  4. - TeamGroup T-Force Delta RGB 32GB (2x16GB) DDR5 6000 MHZ
  5. - Sappire Netro+ AMD RX 7800 XT
  6. - DeepCool AK620 Digital
  7. - CORSAIR RME Series RM750e
  8. - Lian Li Lancool III RGB
  9. - Win 11
 
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I noticed having expo 1 selected and tuning cpu voltage to 1.2v per the other thread helped but didn't elimjnate the issue completely. Solid yellow light + no boot still happens but seemingly less than half the times now.
 
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Change CPU NB/Soc Voltage to 1.2v after enabling EXPO if it is at 1.3v. Soc Voltage should not exceed 1.25v.

Other thing you can try is Negative Curve Optimizer 05, 10, 15, 20, 25 or 30 to Undervolt the CPU VCore Voltage to see if it boots stable after that.
 
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It does sound like a possible partially degraded memory controller due to a period of higher than ideal voltages. If you turn off EXPO altogether, combined with your lower SOC, does that settle things down? If so, it would be worth trying to replace or upgrade your CPU as the first part to purchase.
 
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I remembered seeing this thread about a solid CPU and DRAM LED. Unfortunately, it probably won’t help in this case. But it does suggest a fairly common problem. I have also come across reports of people under the impression that 7-series AMD chips are experiencing premature failures, and in some cases 5-series, too. It’s hard to know if it is outside of a normal failure rate for CPUs, which has to be very low. But, the SOC voltage is often the first point of interest. The latest example is the bad press about burnt 9000 chips on ASRock motherboards being way above other manufacturers. Again, with the SOC voltage being a common concern.

 
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Thanks for all the help so far! I have since disabled EXPO, lowered voltage to 1.2v, Negative Curve Optimizer 30, and PPT limit. Unfortunately, solid yellow light still happens regularly. Sometimes I have to restart 5 times in a row until it finally boots when yellow light quickly disappeared after power on. Am I SOL and should I consider replacing the CPU?
 
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If you have disabled EXPO then you can set CPU NB/Soc Voltage back to Auto as it would use around 1.030v or less with EXPO disabled.
If it still doesn't fix it, consider replacing the CPU.
 
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Oh boy, neither of those pictures look encouraging. You definitely have what looks like a bent pin. It looks like it could be easier to fix (using a pin) than ones in the middle of the chip. You should find help online, especially look for how-to videos related to AMD. All my sources are for Intel.

In regards to the dark spots, it's hard to say. It could certainly be due to burning from over-voltage. I have included pictures of the range of AMD issues that you can see. Yours is closest to the milder cases, as shown by the left image.
1748629301554.png

I would fix the bent pin and reassemble everything to see if your issue goes away. However, you may be able to clean off the black marks with Isopropyl Alcohol.
Maybe Citay has some thoughts to share.

EDIT: I have read two possible theories on why CPU pads may show signs of carbon deposits. One is obviously due to high voltage. The other is a theory about cooler tension and possible poor contact that develops over time, which could lead to arching of one or more pin-to-pad connections. It's just a theory, but no one really has a handle on this. In related news, ASRock just came out and suggested excessive PBO settings as a possible cause for burning. Between Intel's degradation and AMD's burning, we ain't doing too good.
 
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CPU NB/SoC and CPU VDDIO / Memory Controller Voltage higher than 1.25V 24/7 would be the main culprits behind CPU degradation, eventually causing boot issues in most cases i think, and sometimes burn marks on CPU.
Keeping EXPO and PBO disabled from the beginning and manually setting DRAM Frequency to 5200 for 7000 Series CPU and 5600 for 9000 Series CPU would be probably for the better for staying on the safe side. Be sure to check CPU NB/SoC and High CPU VDDIO stays the same around 1.030V and 1.10V or less after manually setting DRAM Frequency.
Also RAM Manufacturers need to optimize EXPO Profiles to work with 1.2V CPU NB/SoC and 1.2V CPU VDDIO / MC Voltage.
 
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