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PC giving 'no signal' when booting up

Hey all, just built a new pc and having a bit of trouble. PC specs are: MSI Tomahawk mag b550 mobo, EVGA geforce 3060 gpu, ryzen 5 3600 cpu, an old seagate barracuda 1tb hdd with an existing windows installation on it (i figured i could pull this out of my old pc and put it into my new one and it would boot from that), an evga 700 gd psu (non-modular), and a 1tb samsung nvme ssd.

Upon finishing assembling the pc, plugged it in and fired it up and got the bios, hit f10 to exit and... no signal. Subsequent reboots gave the same result, and no amount of hitting the DEL key, or the F11 key would cause the BIOS or boot screens to show up. Something else to note is that the ezdebug light on the mobo was lit up on 'Boot' during these times.

Edit: The HDMI cable that I tested everything with is a working cable.

Here's everything I've done to try and rectify the issue (I turned the pc on after each attempt):

  • Re-seated and ensured all power supply cords were connected properly
  • Reset CMOS via shorting
  • Reset CMOS via removing the CMOS battery
  • Removed one stick of ram, turning it on with one remaining stick, and vice versa
  • Plugged hdmi cord into mobo
  • Removed GPU
  • Removed only the HDD
  • Removed only the SSD
  • Removed both HDD and SSD
    • Note: The PC actually booted back up to BIOS after this change, but after hitting f10 to exit again, I got the no signal error again and subsequent attempts with both the HDD and SSD removed didn't send me to BIOS anymore.
  • Removed the HDD, kept the SSD, and booted the pc while a USB containing a windows install on it was inserted
    • Note: The boot light on the mobo ezdebug disappears when I have the USB inserted.
  • Tried with an older GPU
  • Tried a displayport cable on both the gpu and the motherboard without a gpu installed
    • Note: the VGA light on the mobo ezdebug turns on when i dont have a gpu installed

If anyone has any ideas/helpful advice, it is much appreciated!!

EDIT: I managed to get windows installed into the ssd. I updated the bios via usb and the bios flash button on the mobo, then booted with my windows installation usb. After windows installed, it normally reboots into windows, but instead it rebooted into a no signal screen again So im still having the issue.

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SOLUTION

After extensive testing, I determined that the GPU was the issue. For some reason, the tomahawk mobo did not register an old gpu, so in order to test it i had to get a new mobo, which fortunately did register my super old gpu. It ran perfectly. I then had the opportunity to run the new 3060 in a known working PC which would rule out the motherboards, and I got the no signal error. Ultimately, the GPU was determined to be defective, and upon further inspection it seems parts of the contacts on the chip were missing, shorn perfectly horizontally at the tip, meaning it was likely a factory error.

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Hi @mrcaveman,

I'm not surprised that you couldn't get into BIOS or get a display when connected to the motherboard's HDMI connector, with the GPU card removed as the Ryzen 5 3600 CPU doesn't have integrated graphics so it shouldn't have even passed POST i.e. no video adapter detected during POST.

Try connecting a system speaker (example only) to the JFP2 motherboard header pin connector (see p.13 & p.19 of the motherboard manual for details) and then check for any BIOS beep error codes when starting the PC to hopefully find out what's happening when starting the PC to see if it is even passing POST and whether the problem is video related and not something else.

Update (07/18/2022)

Hi @mrcaveman

Try booting into safe mode and check if you get a display.

You didn't say what OS you installed so here's how for Win 11 or Win 10

If you get a display in safe mode, then you have a driver problem, most likely a video driver problem. Check that you have the latest drivers installed appropriate to the OS

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You are trying to boot off the old HDD. Your BIOS may not be set for legacy MBR.

Beside that, the best outcome would be to have the system on the SSD. Since you can boot to the USB Windows install. I would install that on the SSD and see what happens. I never like using old systems with potential registry issues, but I have used old HDDs in new systems when I knew there was little change for registry errors to get going quickly. Then it was more like will this really work?

Once you have a working system you can access the old HDD. Personally, I use my old HDD to hold my user files. This way, if I have a system issue, I can reimage my system without affecting my data files. Also, the SSD can be 256GB - for some 128GB is totally big enough.

I know, you don't want to reinstall all your programs, but with the HDD you can move program specific config files and at least you won't have to reconfigure all the programs - that is if you can find them.

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Honestly, that's what I'm aiming to do now. The issue is that nothing appears on my screen when I turn the computer on. I apologise, i may have been using the wrong terminology, but when I turn the PC on, all the lights come on, the fans come on, it looks like it's working, but I just get a 'No Signal' on my screen, nothing else. Can't get it to do anything else.

von

If your drive light is blinking for a long time, as in booting up, and you think it is working, why did you pull the GPU? That appears to be where the problem is.

Is your HDMI cable plugged into the GPU, NOT the MB?

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Hum, sounds to me like a broken motherboard. I've had that problem multiple times, and each time it was bent pins in the CPU socket, PC's both started showing a signal after replacement. In other words don't remove your CPU unless completely necessary.

Hope This Helps :)

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"when I turn the PC on, all the lights come on, the fans come on, it looks like it's working"

How can it be a bad CPU?

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Cave Man wird auf ewig dankbar sein.
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