Question PC starts "normally" but randomly kills video, k/m signals

Pharanoia

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Dec 8, 2013
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Hi, I started to face this problem recently with my computer after no issue at all, it starts like normal and I can even use it for a while, until randomly the video signal stops and the keyboard and mouse show no lights on, while the mobo lights stay on with an orange led flashing at the top right (couldn't find anything on the manual), RGB from the memory sticks stay on, as well as the CPU and GPU fans (no overheating on hwmonitor).

Tried cleaning all the dust with compressed air, reapply thermal paste l, nothing seems weird in the eye. Proceed to test the PC with a borrowed SSD getting the same crash.

Then I try to memtest each ram stick for 2 hours flawlessly and prime95 for a few minutes, no issue.
Tried Asus realbench and playing videogames and seems to trigger the crash faster, low load usage like CMD commands also present random crashes.

I'm assuming the issue came from having the PC connected directly to the wall socket damaging the hardware components, at this point I have no clue and whocrashed doesn't show any recent event, sadly I don't have another computer to test each part, my best bet right now is troubleshoot with new parts (not a big budget right now)

My specs are:
CPU: AMD RYZEN 5 2600
Mobo: b350 f Asus
GPU: Sapphire R9 390
RAM: Corsair Vengance RGB 2x8
PSU: EVGA Supernova 750 B
HDD: 2x Western Digital 1tb

Thanks in advance

EDIT: New PSU just arrived but the problem persisted, mobo is now on it's way
 
Last edited:

Colif

Win 10 Master
Moderator
orange flashing light could be ram - according to questions about it on reddit.

closest I got was what the 4 led represent but not what colors are each - https://rog.asus.com/forum/showthread.php?96113-ROG-Strix-B350-F-Gaming-Orange-Light

if they have same colors across many boards its the ram light - https://www.asus.com/support/FAQ/1042678/

orange led at bottom is a power led.

is this right board? i don't see any mention or error led - https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/STRIX_B350-F_GAMING/E13031_ROG_STRIX_B350-F_GAMING_UM_V2_web_20170606.pdf

prime 95 for a few minutes isn't exactly long enough, it can last a day.

I would run longer tests with memtest.


random power offs of USB & monitor make me think it might be PSU as well. Its not a bad unit but anything is possible.
 

Pharanoia

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Dec 8, 2013
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orange flashing light could be ram - according to questions about it on reddit.

closest I got was what the 4 led represent but not what colors are each - https://rog.asus.com/forum/showthread.php?96113-ROG-Strix-B350-F-Gaming-Orange-Light

if they have same colors across many boards its the ram light - https://www.asus.com/support/FAQ/1042678/

orange led at bottom is a power led.

is this right board? i don't see any mention or error led - https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/STRIX_B350-F_GAMING/E13031_ROG_STRIX_B350-F_GAMING_UM_V2_web_20170606.pdf

prime 95 for a few minutes isn't exactly long enough, it can last a day.

I would run longer tests with memtest.


random power offs of USB & monitor make me think it might be PSU as well. Its not a bad unit but anything is possible.
I'll try to run prime for at least 2 hours and a few more test in memtest.
It's the correct mobo, the left change isn't on the manual, but I hoped it will serve the troubleshoot.
I mention the psu on the wall socket because the converter power surge in my city, it probably handed some but maybe failed at some point (just as guess)
 

Pharanoia

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Dec 8, 2013
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Welp, a few longer passes arround 6 hours came well, PSU and a a regulator are on it's way, thanstng those will help to narrow the issue to the motherboard, and maybe the GPU and CPU.
I tried changing the gpu to another slot, it kept crashing.
 

DSzymborski

Titan
Moderator
Welp, a few longer passes arround 6 hours came well, PSU and a a regulator are on it's way, thanstng those will help to narrow the issue to the motherboard, and maybe the GPU and CPU.
I tried changing the gpu to another slot, it kept crashing.
Good move. When it comes to power and safety issues, it's better safe than sorry. I never let a PSU get to strike two.
 

Pharanoia

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Dec 8, 2013
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ahh I see. Its possible, I always have my PC plugged into a surge protector as its cheaper to replace one of those than my PC or parts in it.
I used one multi contact strip before... Until it turned into flames, trying to get a better protection now hahaha
 

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