Riddle me this. B550M Pro4 won't post |
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kozywozy
Newbie Joined: 09 Nov 2020 Location: Greece Status: Offline Points: 9 |
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I will, once I get my hands on one but it is
highly unlikely. I mean those specs could get away with a much less powerful psu. plus it did work for a while with no issues. If it needed more it would from the beginning. |
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MadScientist
Groupie Joined: 17 Aug 2020 Location: TN Status: Offline Points: 483 |
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Could be the PSU. I would try a PSU with at least 650W.
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kozywozy
Newbie Joined: 09 Nov 2020 Location: Greece Status: Offline Points: 9 |
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Thank you for your reply and your suggestions unfortunately I have tried all those as well.
No peripherals, no sata, no headers, even no fans since the heatsink of the cooler is enough to cool this CPU passively on idle. Tried booting with m.2 and without still no luck. Reseated CPU just in case but still, no post and the leds are on. not even using a power button just shorting the headers. Swapped vga cables for dvi, swapped all power cords from all three psu's nothing. I have a speaker that I have connected to the headers and it doesn't make any sound and this is weird, (did swap orientations just in case I am placing it wrong) but my assumption is that the default setting on the motherboard is to have it disabled. I can't check it though. So again I am at a loss. I have a weird reasoning to my head, maybe this board needs a more powerfull PSU the max wattage I have tested is 550 but this is just crazy talk of a frustrated guy. |
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Xaltar
Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 24113 |
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Ah, gremlins, oh how I don't miss dealing with them back when I used to do call out
work Troubleshooting this kind of issue amounts to figuring out the answer to the question of: What haven't I checked? So we know the board checked out ok when you sent it back, we know the CPU and RAM are good because you tested them in another system. What, if anything, from the original, non functioning setup is still involved in your testing and I mean anything. SATA cables, display cables, power cables, fans, add in cards, network cables, front panel headers (disconnect them), front panel USB, splitters, peripherals, flash drives. Rule out literally everything by using a completely different setup. I have seen a system fail to post because of something as silly as a bad front panel USB 3.0 cable. As soon as it was unplugged the system came to life. You clearly know what you are doing and have done a great job troubleshooting so far so I have tried to suggest a few of the more easily overlooked options to try out. Good luck and let us know how it goes. Edited by Xaltar - 09 Nov 2020 at 4:32pm |
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kozywozy
Newbie Joined: 09 Nov 2020 Location: Greece Status: Offline Points: 9 |
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I am at a loss and all my computer knowledge is put to the test with this issue so any suggestions from now on are kindly appreciated.
First of all specs CPU: Ryzen 3 3100 Mobo: B550m Pro4 Memory: F4-3200C16D-16GIS by G.Skill 2x8GB GPU: MSI GT 720 SSD: Samsung 960 evo 256GB CPU cooler: Noctua NH-D9L PSU: TR2 RX-450 (old I know but was working fine) Build this system and everything run smoothly from the first go. No troubleshooting leds lighting up and posted just fine. Installed OS (WIN 10) no problem, configured some network stuff because I wanted it to be able to use remote desktop and wake on lan all good. Rebooted updated bios, set XMP and went to OS again all without a glitch. Downloaded A-Tuning and Ryzen Chipset drivers to control fans and set up ryzen power plan and then left the PC running. For two days all were good. On the third I left the PC running and went on some errands only to come back to a blank monitor. The power led was on so I thought it went to sleep or something but after further inspection nothing was working. Pressed the button continuously for a hard shutdown, nothing. Opened the case and saw that two leds were lit. The DRAM and the CPU. First thing I did swapped the PSU with another one I know it was working cause I am using it at my backup file server. It is old but I know it runs OK. I knew the other one was running OK too but just in case. Same behavior. Leds light up instantly no post. Used third PSU from my main file server which runs flawlessly 24/7 No Post leds on Cleared CMOS both jumpers and battery No Post leds on took everything out to eliminate a short No Post leds on Reseated ram to A1 B1 No Post leds on Reseated single stick to all positions No Post leds on Tried different stick from my main PC No Post leds on Installed RAM on main PC worked on first boot and after a memtest 0 errors Installed CPU and RAM on main PC, everything works and boots up fine At this point I was sure it was a motherboard issue so I sent it back for a DOA. Two days later I got a response and images that the motherboard with their test CPU, RAM and GPU was running great. It posted and even booted into windows on first try. At this point I am kind of at a WTF stage. I received the motherboard back, went to install all parts again and... No Post leds on Tried my other CPU from main computer 3950X and also the GPU Quadro P2000 No Post leds on Did the same with all three PSU's I have and No Post leds on So I an now clueless and I have no idea what to do next, mind you returning the board is not an option since for some strange reason when it leaves the home it works. No moving house is not an option and yes I did try it on different wall outlets that run on different circuit. Even powered it through my UPS but nothing. Any suggestions would be more than welcome. |
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