Unable to boot up, diagnostic LED CPU light on

[rerear]

Have a issue of PC not able to boot up periodically, diagnostic cpu light stays on on the mobo.

Usually pulling out and replugging in either the CPU cable or the CMOS batt seems to revive it, but it comes back again. Is it a symptom of cpu overheating, since issue is intermittent?

 

[jtjt00]

TS, list down all parts of your rig here. Likely is motherboard dead.

 

[rerear]

Sorry noob here, do you mean mobo issue, can also possibly be intermittent?
BIOS is updated till left with just a LED update which I am reluctant to do, since it doesn't seem related to this at all.

MSI B550M Mortar wifi
Ryzen 5600
3600mhz DDR4 2x8gb
AMD Radeon 6600
ID cooling 60
Super flower 750W Leadex iii

It is really the same as this video.

 

[tsteo77]

Sorry noob here, do you mean mobo issue, can also possibly be intermittent?
BIOS is updated till left with just a LED update which I am reluctant to do, since it doesn't seem related to this at all.

MSI B550M Mortar wifi
Ryzen 5600
3600mhz DDR4 2x8gb
AMD Radeon 6600
ID cooling 60
Super flower 750W Leadex iii

It is really the same as this video.

Are you able to feedback all operating voltages and temperature readings with/without load ? We shall start from this.

 

[rerear]

Here are the figures. I assume this means I haven't yet turned on XMP since I have 3600MHz DRAM, but below is still running at 2667MHz, but shouldn't affect I assume? Took out button battery and also unplug/replugged Graphics card, seems have recovered again, but not sure how to troubleshoot this intermittent issue.

Normal stage
CPU usage: 2%
CPU frequency: 3624MHz
CPU Core temp: 43C
CPU fan: 48%
System temp: 40C
MOS temp: 37C
Chipset temp: 39C
CPU socket temp: 37C
PCIE 1 temp: 36C
CPU core voltage: 1.0420V
CPU NB/Soc voltage: 0.9720V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

Stressed stage
CPU usage: 96%
CPU frequency: 4401MHz
CPU Core temp: 71C
CPU fan: 95%
System temp: 40C
MOS temp: 38C
Chipset temp: 39C
CPU socket temp: 42C
PCIE 1 temp: 36C
CPU core voltage: 1.1940V
CPU NB/Soc voltage: 0.9780V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

 

[86technie]

Sorry noob here, do you mean mobo issue, can also possibly be intermittent?
BIOS is updated till left with just a LED update which I am reluctant to do, since it doesn't seem related to this at all.

MSI B550M Mortar wifi
Ryzen 5600
3600mhz DDR4 2x8gb
AMD Radeon 6600
ID cooling 60
Super flower 750W Leadex iii

It is really the same as this video.

DRAM light means DRAM failure, have you:

- Reset the BIOS setting by either removing the CMOS battery.
If after reset the BIOS and it boots that means the RAM have issue.
- It looks like you are using Tforce DDR4, take note not all RAM are compatible/optimized
for AMD Ryzen.

This is one of the kit I would recommend.

Do troubleshoot and sort the RAM issue first.
Cuz there is one more step which is to update the motherboard BIOS to enhance RAM stability and compatibility.

https://www.msi.com/Motherboard/MAG-B550M-MORTAR-WIFI/support

*Do not update BETA Bios.

However the last step recommend you do after you change or remove the faulty RAM.
Cuz if there is issue with RAM and if you flash the BIOS the motherboard may get brick.

 

[rerear]

Mine is CPU light, not DRAM light, still need to check DRAM?

 

[tsteo77]

Here are the figures. I assume this means I haven't yet turned on XMP since I have 3600MHz DRAM, but below is still running at 2667MHz, but shouldn't affect I assume? Took out button battery and also unplug/replugged Graphics card, seems have recovered again, but not sure how to troubleshoot this intermittent issue.

Normal stage
CPU usage: 2%
CPU frequency: 3624MHz
CPU Core temp: 43C
CPU fan: 48%
System temp: 40C
MOS temp: 37C
Chipset temp: 39C
CPU socket temp: 37C
PCIE 1 temp: 36C
CPU core voltage: 1.0420V
CPU NB/Soc voltage: 0.9720V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

Stressed stage
CPU usage: 96%
CPU frequency: 4401MHz
CPU Core temp: 71C
CPU fan: 95%
System temp: 40C
MOS temp: 38C
Chipset temp: 39C
CPU socket temp: 42C
PCIE 1 temp: 36C
CPU core voltage: 1.1940V
CPU NB/Soc voltage: 0.9780V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

This figures look healthy. Have you change a new cmos battery instead of remove and putting back ?
I checked that a dead cmos battery can trigger cpu light. One more thing, what's the native clock speed of your rams ?
Is 2667mhz it's native clock speed ?

 

[86technie]

Mine is CPU light, not DRAM light, still need to check DRAM?

Yes usually CPU light means DRAM got issue especially XMP profile.
CPU very rarely died, however if you troubleshoot the RAM and still the same.
It maybe motherboard issue.

 

[NightRaven49]

Yes usually CPU light means DRAM got issue especially XMP profile.

that doesnt make any sense, dram issue will be dram light, not cpu light. but i agree that unless u damaged ur cpu (either via breaking pins or killing it thru oc), cpu light generally means mobo is faulty.

 

[86technie]

that doesnt make any sense, dram issue will be dram light, not cpu light. but i agree that unless u damaged ur cpu (either via breaking pins or killing it thru oc), cpu light generally means mobo is faulty.

Yes correct but these DLED is just a rough gauge so have to troubleshoot.

Only if DRAM and CPU both lit up and doesn't move no matter what you do.
Is confirm motherboard dead but if only 1 or 2 lit up than have to troubleshoot to confirm.
CPU light when on can also mean PSU issue, test with another PSU to confirm.

 

[TanKianW]

Have a issue of PC not able to boot up periodically, diagnostic cpu light stays on on the mobo.

Usually pulling out and replugging in either the CPU cable or the CMOS batt seems to revive it, but it comes back again. Is it a symptom of cpu overheating, since issue is intermittent?

Here are the figures. I assume this means I haven't yet turned on XMP since I have 3600MHz DRAM, but below is still running at 2667MHz, but shouldn't affect I assume? Took out button battery and also unplug/replugged Graphics card, seems have recovered again, but not sure how to troubleshoot this intermittent issue.

Normal stage
CPU usage: 2%
CPU frequency: 3624MHz
CPU Core temp: 43C
CPU fan: 48%
System temp: 40C
MOS temp: 37C
Chipset temp: 39C
CPU socket temp: 37C
PCIE 1 temp: 36C
CPU core voltage: 1.0420V
CPU NB/Soc voltage: 0.9720V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

Stressed stage
CPU usage: 96%
CPU frequency: 4401MHz
CPU Core temp: 71C
CPU fan: 95%
System temp: 40C
MOS temp: 38C
Chipset temp: 39C
CPU socket temp: 42C
PCIE 1 temp: 36C
CPU core voltage: 1.1940V
CPU NB/Soc voltage: 0.9780V
DRAM voltage: 1.2160V
DRAM frequency: 2667MHz

If you interpreted the mobo pre-boot sequence/diagnostic light "correctly".....

And know how to, I will remove the heatsink and resit the CPU. When CPU unseated, do check if any pins (on mobo or CPU, based on your socket) are not in their original position (bend/slanted). You can try aligning back if you know and are confident to do so. A mechanical pencil does the job pretty well too. When putting back the HSF, do ensure you tighten it correctly, but not over tighten if it is those screw on type of HSF. If the screw mount is on four side, do check out the correct way of fastening to prevent overtightening (Eg. going back and forth to tighten the screw on each side slowly).

Just as a precautionary measure, I will remove the memory, air-can blast the memory slots then resit. I will also clear the CMOS by flipping out the battery then put it back on. Run all on default and observe for a few days. I will even just use a spare PSU to run the system to rule out the PSU issue.​