PC won't post and boot loop

JamesU2005

JamesU2005

JamesU2005

Soldato
Joined
30 Nov 2005
Posts
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Location
London
Hi,

I've just finished building the following:

ASRock AB350M PRO4 motherboard black
AMD Ryzen 5 1600X
Corsair CMK16GX4M2A2666C16 - VENGEANCE® LPX 16GB (2x8GB) DDR4 DRAM 2666MHz C16
Corsair RM650x
Samsung (MZ-V6E500BW) 500GB EVO M.2
Nvidia GEFORCE GTX 1070 Ti 8GB Founders Edition
Corsair Air 240 Case
Corsair Hydro H60 Liquid CPU Cooler - Black

Unforuanely, the PC won't post, everything powers on correctly but nothing displays on the screen.

The PC then powers down after about 30 seconds and then powers up again. It gets stuck in this loop.

I've re-seated the RAM, tried with one stick of RAM, no sticks of RAM, without the GPU, with the GPU. Re-seated the CPU.

I've now removed the CMOS battery and set the CMOS pins to clear. Going to leave it like this for a few hours now.

If this doesn't work, what should I do next?
 
No luck on the CMOS reset. Still does the same.

If I remove the CPU power cable from the Motherboard, the powe looping stops. What could that mean?!?
 
JamesU2005 said:
No luck on the CMOS reset. Still does the same.

If I remove the CPU power cable from the Motherboard, the powe looping stops. What could that mean?!?
Click to expand...

Have you got your ram in the correct slots ? ive seen this so many times, you have to use the 2nd and 4th slots first, refer to the manual if you are unsure, clear the cmos after moving it if its in the wrong slots.
 
Yes RAM in the correct slots. Have cleared the CMOS multiple times now.

Have tried RAM in all slots, tried with just one stick too.

Have tried booting without RAM but loop continues.

The only time it doesn’t loop is when I remove the CPU power cable from mobo. Have tried reseating CPU too.

Feel like I’m running out of options?
 
I had corsair RAM paired with my 1700 and it looped like that when ever i had it set to anything different to the default settings

Have you got a motherboard speaker that may give you some guidance?
 
Unfortunately the case or mobo does not come with a speaker

Thing is it still loops with RAM installed or removed!

The confusing thing is the fact the looping stops when the CPU power cable is removed from mobo...
 
JamesU2005 said:
Unfortunately the case or mobo does not come with a speaker

Thing is it still loops with RAM installed or removed!

The confusing thing is the fact the looping stops when the CPU power cable is removed from mobo...
Click to expand...

try with the GPU removed, see if it still loops, if the looping stops, put the GPU in the 2nd PCI-e slot, I know its an x8 slot, but you can configure the bios once you get a display and then move the GPU.

Failing that, I would say you have a DOA part.
 
Same thing I’m afraid. Just constant looping.

Going to send it back and order a different make mobo. Probably an ASUS. Never touching ASRock again.
 
I have just have just seen a thread on a different forum where someone was having the same issues (with a 1600) and in there case the GPU was DOA when they swapped it out it worked, is the GPU new?
 
Removing the CPU power cable is probably creating a lower-level error state. So while it seems good, the "different" behaviour is just a more firm "Nope" reaction from the system.
 
Just a stab in the dark, but there is a very slight chance that you got one of the first edition on boards, just depends on how many the retailer sold really, you could have had an old one off the bottom of the pile, in which case, if the bios has never been updated on it, then maybe it doesn't yet support RyZen 5's and only has R7 support, sometimes on the motherboard there is a sticker stating which revision of board you have or the bios version the board shipped with.

This time last year when R5's were released after B350 and X370 boards and R7's this was a massive problem for people buying these boards with R5 CPUs.
 
Yeah cleared the CMOS jumper with PSU off. Also removed mobo battery, leaving it out for a few hours.

According to the BIOS number printed on the board Ryzen 5 should work.
 
On the other hand, do you have another GPU you can try ? could be that the bios needs an update to support a 1070Ti as its a fairly new GPU to the market.
 
Test the GPU in any other sytem and you'll know if that's the issue. There's no need to remove the battery, there are very niche needs to do this, the CMOS jump is sufficent(and there) for resetting the bios, so removing the battery for hours isn't going to do anything more than taking it out for a few minutes.

Grab yourself a PC speaker for a few quid online, some beeps would likely help isolate the problem.
 
Alternatively - buy the cheapest (working) compatible graphics card you can get to test the system.

I keep a HD 5450 to hand for this - for a long time it was the lowest graphics card that linux amd proprietary drivers supported.
 
I know this is very much of a long shot but check the CPU 12v supply connection. The PCIe express supply connector will fit the same socket on most MB's BUT the +12 and earth cables are reversed. Of course you may already be using the PCIe supply. As I say - long shot.
 
no bent pins on the socket? i had a similar issue with an old 1st gen and at the time it was ram related, obviously this is old stuff, so i replaced the ram and it worked fine for awhile, somewhere down the line of changing/reseating cpu i had some bent pins either from my own fault or i just didnt pick up on them at the time, it wasnt as obvious as it can be.
 
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