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B350 Tomahawk CPU DRAM LED Not like other posts

So I've seen some of the other posts on topics very similar with the B350, but my issue is slightly different. I put together a budget gaming machine for my nephew for Christmas.

MSI B350 Tomahawk
Ryzen 3 1200
Geil Evo Potenza 8GB (2 x 4GB)

I am using the second and fourth slots. Where my issue is different is that this problem has sort of appeared spontaneously. We have had this machine up and working since Christmas day. Our first symptom was having trouble getting the computer to wake from Sleep. After a hard reboot it came back and we didn't think much of it. This weekend, we simply can't get the machine to boot at all. The CPU and DRAM lights are solid and like others, we can't get a video signal, fans and everything else seems to run normally.

Any suggestions on what I can try? Since its not a DOA issue, I assume I go for a replacement? Thanks in advance.
12 answers Last reply Best Answer
More about b350 tomahawk cpu dram led posts
  1. List your exact RAM Part # and I will check for a mismatch.
    There will be no output to monitor till the issue is fixed and the issue seems to be instability.
    Lets try a few things before you decide to RMA.
    Have you updated to latest Bios.? If not then try that.
    Also try one RAM module in the correct slot and try switching modules around.
  2. MeanMachine41 said:
    List your exact RAM Part # and I will check for a mismatch.
    There will be no output to monitor till the issue is fixed and the issue seems to be instability.
    Lets try a few things before you decide to RMA.
    Have you updated to latest Bios.? If not then try that.
    Also try one RAM module in the correct slot and try switching modules around.


    Here is the RAM I ordered.
    GeIL EVO POTENZA 8GB (2 x 4GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)
    Desktop Memory Model GPR48GB2133C15DC

    After looking at it now, it seems they have a different part for AMD setups. I used PCPartPicker, thinking the compatibility filter would catch any issues. If this is it, lesson learned.
  3. Motherboard's QVL is your best friend when it comes to RAM selection on Ryzen. PCPartpicker doesn't check QVLs for RAM kits, it only looks at basic compatibility I believe. Ryzen sometimes will refuse to work with certain RAM. If the new RAM doesn't work and it's on the QVL then the motherboard is the problem. Bent CPU pins can also cause issues with RAM detection although this is more common inside LGA sockets.
  4. GeIL EVO POTENZA 8GB (2 x 4GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)
    Part # GPR48GB2133C15DC are not listed on the MB QVL and so have not been tested.

    That is not to say they won't work however it may require Bios Tweaking to get their SPD.
    Partpicker does not pick up these issues.
  5. MeanMachine41 said:
    GeIL EVO POTENZA 8GB (2 x 4GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000)
    Part # GPR48GB2133C15DC are not listed on the MB QVL and so have not been tested.

    That is not to say they won't work however it may require Bios Tweaking to get their SPD.
    Partpicker does not pick up these issues.


    I attempted getting the machine to boot by removing the memory from Slot 4, so only Slot 2 has memory. That did not work. I would update / tweak BIOS settings, but I can't get that far. Booting shows nothing on monitors and there seems to be no way to get to the BIOS. I've never updated the BIOS but the most up to date version was before I purchased the motherboard. I realize there's a chance it was sitting on the shelf for longer, but I'm not sure how to update the BIOS if I can't see anything.
  6. I think your best bet is to clear CMOS and bring Bios back to default.
    To do this remove the CMOS battery and press the start button. This will discharge any residual info in CMOS. replace the Battery, reboot and try to access Bios.

    If no go then check cabling and connections to monitor to eliminate that possible issue. Although I do note it was working before.

    If still no go then RMA the MB as your Bios may be corrupt.
    If it works and Bios is available, report back for better advice on how to update Bios and further Bios tweaks.
  7. I would try one stick of RAM in every slot and I'd do the same with the other stick as well. If it doesn't POST at all with 1 stick on any slot then:

    - Motherboard issue
    - Bent CPU pin

    As it's 2133 DDR4 it should be able to POST with 1 stick on the default BIOS even if it's not on the QVL.
  8. MeanMachine41 said:
    I think your best bet is to clear CMOS and bring Bios back to default.
    To do this remove the CMOS battery and press the start button. This will discharge any residual info in CMOS. replace the Battery, reboot and try to access Bios.

    If no go then check cabling and connections to monitor to eliminate that possible issue. Although I do note it was working before.

    If still no go then RMA the MB as your Bios may be corrupt.
    If it works and Bios is available, report back for better advice on how to update Bios and further Bios tweaks.


    I attempted to clear the BIOS by removing the CMOS battery. After replacing the battery and rebooting, my speaker now goes off in a series of 3 long beeps. This repeats indefinitely, still not signal out to monitors.
  9. jr9 said:
    I would try one stick of RAM in every slot and I'd do the same with the other stick as well. If it doesn't POST at all with 1 stick on any slot then:

    - Motherboard issue
    - Bent CPU pin

    As it's 2133 DDR4 it should be able to POST with 1 stick on the default BIOS even if it's not on the QVL.


    I checked every slot with both sticks. No go. I'm starting to think you guys are on track with the Mobo. I don't see how I could have a bent pin if it has been working since Christmas and suddenly stopped after a reboot. But I'm just guessing here.
  10. Best answer
    I don't think it's the RAM especially if it worked before, and it's not the CPU as it was never touched. I'd RMA personally if you are getting a DRAM LED with only one stick and trying different sticks. If it doesn't even POST with 1 stick then it's the motherboard's at fault. CMOS clear is pretty much the last thing you can do besides trying a different CPU/RAM although I wouldn't. If you RMA it they will have to test it or they'll just send you another one. If the new one doesn't work then I'd go from there. I think it would though. If the BIOS is corruped then that's the motherboard's fault as well if you didn't pull the plug out of the wall during a BIOS update.
  11. jr9 said:
    I don't think it's the RAM especially if it worked before, and it's not the CPU as it was never touched. I'd RMA personally if you are getting a DRAM LED with only one stick and trying different sticks. If it doesn't even POST with 1 stick then it's the motherboard's at fault. CMOS clear is pretty much the last thing you can do besides trying a different CPU/RAM although I wouldn't. If you RMA it they will have to test it or they'll just send you another one. If the new one doesn't work then I'd go from there. I think it would though. If the BIOS is corruped then that's the motherboard's fault as well if you didn't pull the plug out of the wall during a BIOS update.


    Thanks for your help jr and meanmachine. I really appreciate it.
  12. jr9 said:
    I don't think it's the RAM especially if it worked before, and it's not the CPU as it was never touched. I'd RMA personally if you are getting a DRAM LED with only one stick and trying different sticks. If it doesn't even POST with 1 stick then it's the motherboard's at fault. CMOS clear is pretty much the last thing you can do besides trying a different CPU/RAM although I wouldn't. If you RMA it they will have to test it or they'll just send you another one. If the new one doesn't work then I'd go from there. I think it would though. If the BIOS is corruped then that's the motherboard's fault as well if you didn't pull the plug out of the wall during a BIOS update.


    Unfortunately, I'm back with a new chapter in the book of never buy budget parts again. To update since my last post, we RMA'd the motherboard and received a new one two weeks later. After installing the new motherboard we got exactly the same result. This forced us to assume I managed to pick a stick of RAM that despite making it through PCPartPicker's filter would definitely not work with this motherboard. I couldn't locate an exact match to the QVL but I got as close as I could (Corsair LPX 8GB DRAM).

    After installing the new RAM, everything seemed to go well. The computer was running well for about 4 weeks and then all of the sudden the machine couldn't boot to windows. The BIOS would post but when it went to start Windows the screen went black with a blinking cursor. No keyboard response would do anything. I was think HD failure. The BIOS could see the hard drive just fine. I attempted to Boot to Safe Mode using our Win10 disc but the utility said the HD was not repairable and I couldn't boot to safe mode. We turned off the machine for the night stumped. The next day, my nephew tried turning on the machine and booted like nothing was wrong. I opened up the case and secured all of the power and data cables. Nothing seemed loose. Later that night, we were back to the cursor.

    It's now been about two weeks with no response out of the computer. We've backed up his hard drive (just in case). During one of the particularly good days I ran a disk utility to check for errors and it found none. Now however we can't get anything beside a blinking cursor. Asking around work friends more savvy then myself, some are suggesting maybe the power supply has been the culprit this whole time. It has a EVGA 450 B3 80 Plus Bronze. Once again I'm asking for your wisdom and appreciate everyone's help. What would be your next step?

    Thanks in advance!
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