Turns on but no POST or display

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   Z370 Killer SLI/ac

i9-9900k OC to 5.0 @ 1.3v 

Came back to frozen PC, rebooted and now I get no display. Everything powers on but have no picture. I don't believe it's even getting to Windows because after a few min, I press the power button once (which should initiate a shutdown from Windows) and nothing happens. I'm not sure if it's the motherboard or CPU. I tried the onboard HDMI port to eliminate the GPU and get no display still.

-Reseated RAM, GPU, CPU power cable, GPU power cable
-Reset CMOS with jumper and removing battery
-Different monitor

Today I'm going to try a different CPU. It's an i5-8500T which is on the compatibility list for the Killer SLI but NOT for the Killer SLI/ac. Not sure what the difference would be for the chipset when it's the same socket? If my current CPU is bad and I put this in, it should still POST even if not "compatible" right? 

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vodka_pong97 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 17 Aug 2021 Status: Offline Points: 20	Post Options Post Reply Quote vodka_pong97 Report Post Thanks(0) Quote Reply Topic: Turns on but no POST or display Posted: 17 Aug 2021 at 7:54pm
	Z370 Killer SLI/ac i9-9900k OC to 5.0 @ 1.3v Came back to frozen PC, rebooted and now I get no display. Everything powers on but have no picture. I don't believe it's even getting to Windows because after a few min, I press the power button once (which should initiate a shutdown from Windows) and nothing happens. I'm not sure if it's the motherboard or CPU. I tried the onboard HDMI port to eliminate the GPU and get no display still. -Reseated RAM, GPU, CPU power cable, GPU power cable -Reset CMOS with jumper and removing battery -Different monitor Today I'm going to try a different CPU. It's an i5-8500T which is on the compatibility list for the Killer SLI but NOT for the Killer SLI/ac. Not sure what the difference would be for the chipset when it's the same socket? If my current CPU is bad and I put this in, it should still POST even if not "compatible" right?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 22793	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 17 Aug 2021 at 10:32pm
	I am not sure why the 8500t isn't on the list for the ac model but it should post as far as I am aware. It's just a low power variant of the 8500 and the 9500t is listed. A bit annoying for you as if it does not post you can't be 100% certain it's not the CPU. If you have not already, try another PSU. This is always the first thing I try when a system suddenly stops working correctly after being stable/in use for a long time. Very often the PSU has degraded and is no longer able to handle the system.