MAG B650 TOMAHAWK WIFI (BLACK SCREEN)

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tziatzias157702de

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Hello,


On May 13th, while I was using my PC, it suddenly shut down. When I tried turning it back on, I was met with a black screen and noticed that two diagnostic LEDs on the motherboard (CPU and DRAM) were lit.


The next day (May 14th), I attempted several troubleshooting steps, including a BIOS flash update, reseating the RAM, clearing the CMOS, and more. However, the issue persists—there’s still no display output, and the CPU and DRAM lights remain on.


What could be the cause of this problem?
 
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I received this from MSI support:

Thanks for contacting MSI technical support.
Regarding your concern,
1) Have you done any Special settings in bios or OS?
2) Please unplug the power supply and CMOS battery for a while.
3) Please check the CPU/Motherboard temperatures in OS , are they very high?
4) Please use anti-virus software to detect the system and remove the suspicious software or programs.
5）Please check the system disk for bad sectors.
6）Update all drivers to the latest version.
7) Please just install one piece of RAM to test again. You can test the graphics card and ram with some software for a try.
8) Please unplug the power-cord and check the cpu, is there any CPU pin bending or fracture?
9) If you have other spare, you can install a clean OS to check again.

Thanks for your cooperation in advance!

Best Regards,
MSI Technical Support Team

My answer:

Dear MSI Technical Support Team,

Thank you for your response.
I would like to follow up with the actions I’ve taken and respond to your questions:

1) I downloaded and installed the latest BIOS from your website (uploaded on 14/05) using the Flash BIOS button and a USB drive. The update completed successfully, but unfortunately, the issue persists—still no display and both CPU and DRAM LEDs remain on.
2) I unplugged the power supply and removed the CMOS battery for approximately 15–20 minutes before reinstalling it. This also had no effect.
3) Since I am experiencing a complete black screen with no video output, I am unable to access the OS to check CPU or motherboard temperatures.
4) I was previously using Norton Antivirus, but due to the black screen and inability to boot, I cannot run or access any software currently.
5) My system uses a Western Digital SN770 2TB NVMe SSD (not an HDD). Again, I cannot run disk checks due to the lack of display.
6) I am unable to update any drivers at this time because I cannot access the operating system.
7) I use G.Skill Trident Z5 Neo RGB 32GB DDR5 RAM (2x16GB). I’ve tested each stick individually in different slots (A2, B2, A1) both before and after the BIOS update, with no change in behavior.
8) My CPU is an AMD Ryzen 7 7700X, which uses an LGA socket with no pins. I carefully inspected the CPU and socket for any visible damage, but found none.
9) I dont have other ssd or hdd.

(Also on the back of the motherboard it used to have a green light on the ethernet cable now its off, also if I connect my keyboard or mouse it doesnt turn on they have leds, but if i plug a usb to the pc and my mobile phone, mu mobile phone its charging which means it received electricity from the pc) (if this helps)

Given the steps already taken and the persistent issue, could this indicate a possible failure with the motherboard or CPU? I would appreciate further guidance.

Best regards,
 
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tziatzias157702de said:
8) My CPU is an AMD Ryzen 7 7700X, which uses an LGA socket with no pins. I carefully inspected the CPU and socket for any visible damage, but found none.
Click to expand...

They are still called pins, even though they are really just contacts in the socket, also see here and the following posts. Ideal would be to take photos of the socket, then we can give a second opinion. Sometimes a bent pin is not that easy to spot.

But also, sometimes you can get this issue out of the blue on AM5, especially on the 600-series boards. Sudden CPU+DRAM LEDs without a real solution. In most cases i would assume it's the board, in some rare cases the CPU. And about the board, spefically it may have to do with the proper contact between the socket and the CPU (hence the check the bent pins as well). Sometimes the contact is not ideal, even without any bent pins, and suddenly this problem can appear. For example you can slighly loosen the cooler screws by a half turn or a turn or so, see if that makes any difference.

You can test with just the board, PSU hooked up, CPU and cooler installed, nothing else, no RAM, no SSDs. If you still get the CPU+DRAM LEDs, it's already narrowed down to what you have in front of you. Then ideally, you'd also rule out the PSU and CPU (by testing with different ones), but my money would already be on the board by then, more or less. Seen this too many times here on the forum, with otherwise nice hardware.
 
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