Question CPU Status Light after switching to new case

[JackPoa]

I switched into a new case I just purchased. Had everything complete and went to boot up the pc. The initial boot had no led status light but the fans weren’t spinning. I smelled a weird metallic smell. I shut off the pc, removed the motherboard and checked for visual damages. I could no locate any visual burns or damage. I removed the aio, and examined the cpu. No bent pins, no visual damages. So I cleaned it off, and applied new thermal paste. Hooked everything back up again and now have power to all components. This time however the cpu status led light is on and I get a black screen.

Motherboard: GIGABYTE B650 AORUS PRO
CPU: 7900x
GPU: 4090 FE
PSU: THERMALTAKE TOUGHPOWER GF3 1200W
RAM: G.SKILL Trident Z5 Neo RGB Series AMD EXPO 32GB

The question I have is did I most likely short the motherboard or the cpu? And if not any ideas or further tests?

 

[Darkbreeze]

Try removing the graphics card entirely from the motherboard and then connecting your display cable to the motherboard's video output to see if you have display that way. Could be a problem with the video card OR it could have reset the BIOS setting to iGPU when you disconnected it from power. It's not probable, but it will tell us something at least and can move on from there.

Might also want to at least TRY doing a hard reset of the BIOS if the first step doesn't work.

BIOS Hard Reset procedure

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for about three to five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes while the CMOS battery is out of the motherboard, press the power button on the case, continuously, for 15-30 seconds, in order to deplete any residual charge that might be present in the CMOS circuit. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP, A-XMP or D.O.C.P profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.

It is probably also worth mentioning that for anything that might require an attempt to DO a hard reset in the first place, IF the problem is related to a lack of video signal, it is a GOOD IDEA to try a different type of display as many systems will not work properly for some reason with displayport configurations. It is worth trying HDMI if you are having no display or lack of visual ability to enter the BIOS, or no signal messages.

Trying a different monitor as well, if possible, is also a good idea if there is a lack of display. It happens.

 

[JackPoa]

Try removing the graphics card entirely from the motherboard and then connecting your display cable to the motherboard's video output to see if you have display that way. Could be a problem with the video card OR it could have reset the BIOS setting to iGPU when you disconnected it from power. It's not probable, but it will tell us something at least and can move on from there.

Might also want to at least TRY doing a hard reset of the BIOS if the first step doesn't work.

BIOS Hard Reset procedure

Power off the unit, switch the PSU off and unplug the PSU cord from either the wall or the power supply.

Remove the motherboard CMOS battery for about three to five minutes. In some cases it may be necessary to remove the graphics card to access the CMOS battery.

During that five minutes while the CMOS battery is out of the motherboard, press the power button on the case, continuously, for 15-30 seconds, in order to deplete any residual charge that might be present in the CMOS circuit. After the five minutes is up, reinstall the CMOS battery making sure to insert it with the correct side up just as it came out.

If you had to remove the graphics card you can now reinstall it, but remember to reconnect your power cables if there were any attached to it as well as your display cable.

Now, plug the power supply cable back in, switch the PSU back on and power up the system. It should display the POST screen and the options to enter CMOS/BIOS setup. Enter the bios setup program and reconfigure the boot settings for either the Windows boot manager or for legacy systems, the drive your OS is installed on if necessary.

Save settings and exit. If the system will POST and boot then you can move forward from there including going back into the bios and configuring any other custom settings you may need to configure such as Memory XMP, A-XMP or D.O.C.P profile settings, custom fan profile settings or other specific settings you may have previously had configured that were wiped out by resetting the CMOS.

In some cases it may be necessary when you go into the BIOS after a reset, to load the Optimal default or Default values and then save settings, to actually get the hardware tables to reset in the boot manager.

It is probably also worth mentioning that for anything that might require an attempt to DO a hard reset in the first place, IF the problem is related to a lack of video signal, it is a GOOD IDEA to try a different type of display as many systems will not work properly for some reason with displayport configurations. It is worth trying HDMI if you are having no display or lack of visual ability to enter the BIOS, or no signal messages.

Trying a different monitor as well, if possible, is also a good idea if there is a lack of display. It happens.

I’ve already removed the graphics card and connected my monitor to the motherboard video output. No display. Last night I also removed the cmos battery, waited 15 then reseated it. I did not continuously press the power button to discharge. Still have no display from the motherboard video output. I have tested with two different monitors, each with 2 DisplayPort cables and 1 hdmi.

The only configuration I haven’t tried is removing the cmos battery, discharging any residual charge, and then connecting the gpu again. I will add that the gpu fans did spin while connected.

 

[Darkbreeze]

Well, I'd pull the board out of the case and bench it before making any other decisions.

How To - Motherboard bench testing

Finding the problem through bench testing If you are here then it’s likely you have encountered a serious hardware issue and have been unable to resolve it using the standard no-POST troubleshooting procedures. If you have not yet attempted to resolve your issues using the no-POST...

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