Motherboard prob ?

[jch]

Thanks for that seems to be pretty much what I am experiencing. I don't have any additional LEDs, so I don't think it's the screw, but I strongly feel that the board is a bit flaky.

Just had any enjoyable hour fiddling again, stuck the old PSU back - no dice, took out a ram module, boots!

One time - then the led again.

I am not going to do anymore troubleshooting, I will wait for a response from Scan, think I'm going to have to get a new mobo, assume Asus are OK ?

Thanks for the help

[ik9000]

Thanks for that seems to be pretty much what I am experiencing. I don't have any additional LEDs, so I don't think it's the screw, but I strongly feel that the board is a bit flaky.

Just had any enjoyable hour fiddling again, stuck the old PSU back - no dice, took out a ram module, boots!

One time - then the led again.

I am not going to do anymore troubleshooting, I will wait for a response from Scan, think I'm going to have to get a new mobo, assume Asus are OK ?

Thanks for the help

Every brand have good and bad boards. Sadly it's not that simple. Take out that bottom screw like the guy in the video. any joy?

[jch]

I haven't yet, (need a break from it).

I have built out of case however, and I had the same prob. Going to wait to see if I have any joy getting a refund, it's unlikely but I did report this with a couple of weeks of receipt - it's new mobo either way.

Also think it may be a good idea to try and limit use, shouldn't happen but I don't want to risk the chip if something is shorting.

[philehidiot]

Suggest attempting to correlate room temperature to the fault.

Often intermittent issues such as these are a result of a hairline crack in a copper line, sealing at warmer temperatures (so when the system boots properly, heat is produced and thus it remains stable) and parting at lower temps leading to faults.

If you're unsure then I'd do something heinous - I'd point a fan heater at your case's intake fans, let it warm up and see what happens. Tracking and repairing a fault such as this is almost impossible and not worth it as PCBs are usually multilayered these days. Best you can do is RMA the suspected part.

[jch]

Thanks, I booted it again two from cold, OK - third, case LEDs on debug light back. I've contacted Scan requested another RMA, just got to hope it shows up, didn't last time.

[john_boy]

Wanted to stop by and update the thread.

TLDR - It was the motherboard. if you're reading this and have a B450/350 MSI and have similar symptoms save yourself time/stress and replace the mobo, (I've seen several reports on the web similar to the youtube video above)

full story :

Want happened, is that the RMA was refused damage to the motherboard, I've lost count of the amount of times that I've stripped the machine apart - and for the last return I broke one of the usb header pins, didn't even notice doing it. In fairness to Scan, they paid for the board to be repaired and tested by MSI (was told that they always test and that should pick up on any other issues).

At this point, I decided to bite the bullet and swallow the cost of a new, non-MSI board, went for a Gigabyte Aorus pro. It's been running now for over a month, and no repeat of any of the previous symptoms. Pity that the probs with the first board (currently it's a paperweight, can't go through another rebuild to see if it's actually working or not) weren't picked up on the first RMA, but the machine works now and sound is a *lot* better.

Thanks to all on this thread for advice/help.