Debug code "d"

I can't help but wonder if the dehumidifier function was enabled and the "d" simply stands for it.

Problem solved after updating to the latest BIOS v2.10

Skylinestar wrote: Today, I power up my pc, my ASRock Z170 Gaming K6 mobo debug code shows "d". My casing power led doesn't light up. The fans do run. What does it mean?

If you mean you have a Dr Debug code of "0d" (zero d), this is what the ASRock Z170 board manuals say about that code:

Problem related to memory, VGA card or other devices. Please clear CMOS, re-install the memory and VGA card, and remove other USB, PCI devices.

It seems like your PC was working fine previously, and just today you had the problem with the PC not starting, and you see the "0d" code, right?

You also said the power LED on your PC case did not light up.

In general, this code means one of the basic parts of the PC like memory or the video card failed.

But it could also mean that your power supply (PSU) is not working right, so the memory or video card cannot start.

You did not list a video card in your Rig list, but if you use one or not does not matter.

I think your PSU is not working right because while the fans were running, they use +12V power, but the case power LED did not light up, which uses +5V power. So the +5V power part of your PSU may not be working. What model of PSU are you using?

I would try testing the PSU, by trying a different PSU in the PC. It could also just be a connection between the mother board and PSU is not good. Check the 24 pin main ATX power cable, and the 4/8 pin CPU power cable.

Or you can try clearing the BIOS as the manual suggested for the 0d code. If the PSU is not broken, then something else might be defective, like one of the memory DIMMs.

Is there anything else you can tell us that happens when you try to start the PC?