Meaning of d6 5beeps 20(GPU inserted & functional)

Dear ASrock-Support-Forum,

I use a number of ASrock motherboards in my PCs. One of them (x370 Taichi) does not boot correctly (takes a long while and makes 5 beep sounds 2 times) and does not display anything (the CPU has no GPU function). It does, however, make windows sounds.

While beeping 5 times the two digit indicator shows d6 and then 20.

According to the manual 'd6' 5 beeps and then '0d' means no GPU function. I however do not get the 0d after the d6, instead I get 20 after the d6 (d6 5beeps 20). What does this mean.

Below I have written down all digits appearing while booting up the system. I have recorded the indicator and played it back at x0.25 speed. Still some digits where too fast to pickup.

Turing PC on

Blank for a while
33
7A
3b
60 (very short)
b6
Quick sucession of numbers then
27
Blank for a while
38 (very short)
33
7A
38 (very short)
3b
Quick sucession of numbers
60 (very short)
Quick sucession of numbers
27
28 (very short)
95
Blank for a while
38 (very short)
33
7A
3b
38 (very short)
3b
Quick sucession of numbers
60 (very short)
Quick sucession of numbers
27
Quick sucession of numbers
60 (very short)
Quick sucession of numbers
99
98
b4
A2
A8
A2
A8
A2
98
d6 beep 1 2 3 4 5
88 (very short)
20
E6
Quick sucession of numbers
70
Blank for a while
38 (very short)
33
7A
3b
38 (very short)
3b
Quick sucession of numbers
60 (very short)
Quick sucession of numbers
95 (very short)
Blank for a while
38 (very short)
33
7A
3b
38 (very short)
3b
Quick sucession of numbers
60 (very short)
Quick sucession of numbers
27
Quick succession of numbers
90 (very short)
Blank for a while
38 (very short)
33
7A
7b (very short)
3b
38 (very short)
3b
Quick succession of numbers
60 (very short)
Quick succession of numbers
27
87 (very short)
Blank for a while
38 (very short)
33
Quick session of numbers
7A
3b
38 (very short)
3b
60
Quick succession of numbers
27
28 (very short)
Quick succession of numbers
95
Blank for a while
33
7A
3b (very short)
38 (very shkort)
3b
60
88
27
88
99
98
b4
A2
98
d6 beep 1 2 3 4 5
02
77
70
Blank from now on

PC makes Windows sounds but no signal on the display.

According to an e-mail I got from the ASrock support, this might indicate that, there is no GPU installed or the GPU is defective. I have therefore reinserted the GPU and it still did not work.

As I was advised, I have tried another GPU in my system and fortunatly the PC booted up and put out a video signal. I concluded, as it was suggested, that this might mean that my GPU, I had installed originally, is defective.

After taking the 'none functioning' GPU to my dealership, they have installed it in one of their systems and told me that it worked fine in their system. Since I did take extra care of testing my original setup with reinserting the card, I am confused. Why did it not work on my system, eventhough my system works with a different GPU.

In short:

-my x370 Taichi motherboard doesn't work with the original GPU (see the sequence of 2 digit codes and beeps), it does, however, work with a differnet GPU

-my original GPU does surprisingly work at dealership (I'm going to test this myself with antoher system soon)

In light of this information, can you tell me, what the sequence of two digit codes, as well as the five beeps might mean in this particular context? The GPU is functional at the dealership, still I get these digits and beeps in my system at home. With a different GPU there is no issue in my system. I am confused about the situation.

Thanks in advance

Thank you for your response.

Here is what I did:

-tested the GPU with the same DVI-cable and monitor as in the boot scenario in my first post (same result)

-tested the GPU with another cable (HDMI) and another monitor (same result but quicker. No looping perhaps?)

-tested this scenario again (same result)

-tested the first scenario (DVI-cable) again and it booted quickly with just a few codes and no beepind at all and output signal working

-tested this first scenario three more times and it keeps working

I'm confused why this worked. If you have a clue, I'd love to hear you explaination. It works fine now, so thanks for the clue.

That's great, thank you very much. Your suggestion did unexpectedly fix it.