taichi x399 doesn't start

[Busybear]

Hello everyone!

 

 

Built a system using Asrock's taichi x399. All components are brand new. Removed everything except the cpu and cooler & removed the board from the case for debugging. 24 pin is connected & power cable for cpu cooler is connected. If to believe the sticker on the board then fw is 1.5

 

I get the following symptoms:

 

a) both 8 pin and 4 pin cpu cable connected - the psu clicks when i try to turn on the system and that's it. No fans. Nothing. No further attempts possible until the psu has been powered off / on again. Sounds like a short circuit protection mechanism kicking in if you ask me but then again, I'm no expert.

 

*4 pin connector is connected with the latch on the right, which should be correct.

 

b) just 8 pin connected - fans start, debug display stops at C0 and a reboot cycle starts. As I understand, this is perfectly normal as this board requires both 4 pin and 8 pin? I have read contradicting statements about it though, so any further information is most welcome.

 

Both cables are cpu cables as far as i know i.e 8pin-2x4pin. True, the psu originally had just one of those but i bought another one from the manufacturer so it should be ok (psu has outputs marked cpu/pcie).

 

 

What should I try next? Sounds like a problem with the cpu or socket but I really wouldn't want to remove the cooler & cpu before I have ruled out other options. What worries me is my lack of options... If it is indeed either the board or the cpu then finding out which can be rather expensive. Obviously, no one can say with certainty but which seems more likely?

 

It's my first build so I suppose we should consider all possible rookie mistakes.

 

Any advice is much appreciated

 

 

 

 

[Busybear]

Just to make sure it isn't something super simple (as it often is)...

 

Am I correct in assuming that this PSU has what it takes? Bear in mind that I did buy an extra 8-2x4 cable. Outputs can be seen in one of the pictures.

[Busybear]

Apologies for another bump. Will not make additional posts to the topic if I get no replies.

 

Conducted some additional tests.

 

1) Tested the PSU with another system to make sure it could handle some load. Seemed to work OK.

 

2) Removed the CPU from the board. With all the power cables & the cpu fan connected I get nothing from the board except the fancy leds. No dr debug codes, no cpu fan. Is this normal or should I assume the board is the culprit?