Question ASRock B550M Pro SE Won't Power On

Bracer99

Commendable
Apr 15, 2021
8
0
1,510
Hi. I'm putting together a sort of new build for my parents, and I can't for the life of me figure out why it won't power on. The power supply is brand new, tested, works fine. Motherboard and CPU are also new. The RAM is from my personal current desktop and was working when swapped it out for faster RAM. The case is an old Cooler Master HAF, but the panel switches will work if I plug them into the MB of a very old spare desktop. All the cables are firmly seated in their respective sockets. It SHOULD work. Now, as it happens, I accidentally ordered two identical MBs, so just for the heck of it I unpacked the second one and hooked up the power cables and panel leads, then tried turning it on sans CPU and RAM, with a spare case fan plugged into just to see if it would turn on, but it didn't work either.

I'm thinking the panel leads must be the culprit here, somehow. Even though they work with a different MB, maybe they're still failing to connect with the panel on this one, although a jumper should be a jumper, right? Or maybe the panel is laid out differently from what's shown in the manual (and printed on the MB) and I'm not connecting them correctly, although I've tried a couple of different ways to no effect.

FWIW:
CPU: AMD Ryzen 5 3500X
MB: ASRock B550M Pro SE
RAM: G.Skill Ripjaws DDR4-2666 32x2
GPU: MSI GeForce GTX 970
PW: BeQuiet Straight Power 11 550W
Case: Cooler Master HAF full tower
A Samsung SATA SSD

Please Help?
 
Last edited:
Now I realised... the PC doesn't even power on at all, no fans no nothing, my bad for not paying attention.

If everything is connected correctly you can power the system by shorting these 2 pins from your front panel with a screwdriver(touch both of them with it):

0jVP1fM.jpg


See if that works.
 
Now I realised... the PC doesn't even power on at all, no fans no nothing, my bad for not paying attention.

If everything is connected correctly you can power the system by shorting these 2 pins from your front panel with a screwdriver(touch both of them with it):

0jVP1fM.jpg


See if that wor

Now I realised... the PC doesn't even power on at all, no fans no nothing, my bad for not paying attention.

If everything is connected correctly you can power the system by shorting these 2 pins from your front panel with a screwdriver(touch both of them with it):

0jVP1fM.jpg


See if that works.
*slaps head* Never thought of just shorting 'em. I'll give it a shot. BRB...
 
Now I realised... the PC doesn't even power on at all, no fans no nothing, my bad for not paying attention.

If everything is connected correctly you can power the system by shorting these 2 pins from your front panel with a screwdriver(touch both of them with it):

0jVP1fM.jpg


See if that works.
No, that didn't work either
Now I realised... the PC doesn't even power on at all, no fans no nothing, my bad for not paying attention.

If everything is connected correctly you can power the system by shorting these 2 pins from your front panel with a screwdriver(touch both of them with it):

0jVP1fM.jpg


See if that works.
Well, that didn't work either. Now I'm thinking bent CPU pin, although I've never done that before. First time for everything maybe...
 
OK then. I figured it out.

There actually was an extra standoff under the MB -- the new MB is much smaller than the old one, so I had to move a couple and get rid of a couple, and I must've missed it. However, I think the main problem was that one of the USB ports on the front of the case was damaged, and plugging it into the MB was causing a short and keeping the system from powering on.

I'm pretty sure I've got some replacement USB ports somewhere from fixing a PlayStation a few years back, so maybe I'll see if I can repair it sometime. Or not.

Anyway, again, thanks for the help. Mark as solved.
 
OK then. I figured it out.

There actually was an extra standoff under the MB -- the new MB is much smaller than the old one, so I had to move a couple and get rid of a couple, and I must've missed it. However, I think the main problem was that one of the USB ports on the front of the case was damaged, and plugging it into the MB was causing a short and keeping the system from powering on.

I'm pretty sure I've got some replacement USB ports somewhere from fixing a PlayStation a few years back, so maybe I'll see if I can repair it sometime. Or not.

Anyway, again, thanks for the help. Mark as solved.
Nice, common problem... was actually thinking that either case was touching the mobo somewhere or a standoff would be the issue. Always good to recheck everything even if you know you've done it "right".

You can mark the solution yourself, as it was your question.