Question Motherboard Blue Light

hp2015

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Jul 13, 2013
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Hi, i cannot use by PC when I press power button a blue light led lights on the motherboard.
Is there anything I can check to understand if the motherboard or PSU Is broken?

Note: I don't have another PSU or motherboard to switch the current one and test.
 

RealBeast

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Hi, i cannot use by PC when I press power button a blue light led lights on the motherboard.
Is there anything I can check to understand if the motherboard or PSU Is broken?

Note: I don't have another PSU or motherboard to switch the current one and test.
Please post the details of your build, particularly the motherboard, CPU, PSU, and memory models, thanks.
 

hp2015

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Jul 13, 2013
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Please post the details of your build, particularly the motherboard, CPU, PSU, and memory models, thanks.
Motherboard - MSI B150M PRO-DH
CPU - Intel I5-6400
PSU - Thermaltake Smart SE 630W
RAM - Corsair DDR4 2400 MHZ

I build the pc some years ago and today I tried to clear it from dust and after that, it's not running anymore.

Here is the screenshot with the light emitted from the motherboard - https://imageshack.com/i/pmPeu2Agj

Thanks! :)
 

RealBeast

Titan
Moderator
Sorry, but the MSI gallery does not enlarge pictures clearly so I cannot determine what that LED is for, it is not listed in the manual and all the diagnostic LEDs are up by the memory and 24 pin connector.

I would check all the connectors at both ends and the seating of all devices. As a last resort (what I actually do first) is to pull everything out of the case and build it on a sheet of cardboard on my desktop. It's easier to work with and eliminates motherboard shorts and case wiring issues.
 

hp2015

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Jul 13, 2013
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Sorry, but the MSI gallery does not enlarge pictures clearly so I cannot determine what that LED is for, it is not listed in the manual and all the diagnostic LEDs are up by the memory and 24 pin connector.

I would check all the connectors at both ends and the seating of all devices. As a last resort (what I actually do first) is to pull everything out of the case and build it on a sheet of cardboard on my desktop. It's easier to work with and eliminates motherboard shorts and case wiring issues.
Tried the other option and having the same result. I suspect I broke the motherboard somehow :(

I looked at some sellable motherboards for this CPU and I found out that there aren't many cheap alternatives considering that it requires a motherboard specifically for INTEL CPU of 6th generation.

I was wondering if it's better to buy directly a new CPU such as i3-9100F with a new motherboard instead of buying an old generation motherboard, considering that it would cost only approx 75 € more? From what I understand this solution will allow me to reuse all existing pieces such as RAM, SSD, PSU, and external graphic card.

What do you think?
 

hp2015

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Jul 13, 2013
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Iff your current memory is DDR4, then it probably does make more sense to buy a new board and CPU, it will be cheaper in the long run.
I set the new motherboard H310M-PRO-VDH-PLUS with the processor i3-9100F but I am not able to make it work as the motherboard is having the CPU light on as per screenshot https://imageshack.com/i/pmhCxLSej .

I checked multiple times and the CPU results to be correctly set but for some reason, it's not recognized :(:(

Is there anything else to check beside if the CPU was correctly set? I am thinking on returning these items back...
 

RealBeast

Titan
Moderator
Clear the CMOS (bios) by moving the clear CMOS jumper for a moment. Then try to boot. If that fails then I would pull it out of the case.

Disassemble and do a desktop build on a sheet of cardboard, which is non-conductive and won't damage parts. The motherboard and CPU are compatible and the first bios made for the board supports your CPU.

Take a very close look at the pins in the motherboard socket for the CPU to see if any appear bent. If so, try to take a picture of the pin(s) and our resident pin straightening expert USAFRet can take a look at it and make suggestions.
 

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