PRIME B350 PLUS bios update failure

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kapataki

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Apr 13, 2017
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I tried to update my bios from v. 0515 to v. 0606 using EZUpdate on windows 10. But, bios was stuck for 2 hours, so I tried to restarting my pc and try updating in bios. But, when restarting, I only got black screen and fans running. The monitor does not respond at all. I have tried to use original CD to get to the boot screen, but I still didn't get any monitor response.
Please Help.
Thank You
 
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yessir.. fans are running, LED's are lighting up. I can hear the HDD whirring.. but no response from the mobo.

 
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ASUS support told me RMA would take 5 - 7 days plus shipping time. Haven't sent mine yet, I have to get on that.
 
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I got the sam problem. Updated hanged, and after restart, there was no beep from MBO, no picture on screen, only fans raunning on full.

And after reading comments here, i was sure i bricked my MBO permanently...


but luckily this helped:
1. downloaded latest BIOS from asus webpage (the same one that hanged EZ update)
2. formatted USB drive with FAT32 with default allocation unit size
3 copied bios file to USB and renamed it PRB350PS.CAP
4. plugged USB stick to port next to LAN port (it was USB3.0, but I dont think it matters)
5. restarted PC, and menaged to enter Flash utilitiy, where i selected PRB350PS.CAP, and flashed it.
6. restart and remove USB

Good luck guys, I hope you solve your problem
 
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Did anyone else have any luck with this? It seems that with the USB drive in the PC my fans at least slow back down, whereas they just kept running at fill before. About how long did yours take to complete the restore? Did you get a display?
 
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I got the sam problem. Updated hanged, and after restart, there was no beep from MBO, no picture on screen, only fans raunning on full.

And after reading comments here, i was sure i bricked my MBO permanently...


but luckily this helped:
1. downloaded latest BIOS from asus webpage (the same one that hanged EZ update)
2. formatted USB drive with FAT32 with default allocation unit size
3 copied bios file to USB and renamed it PRB350PS.CAP
4. plugged USB stick to port next to LAN port (it was USB3.0, but I dont think it matters)
5. restarted PC, and menaged to enter Flash utilitiy, where i selected PRB350PS.CAP, and flashed it.
6. restart and remove USB

Good luck guys, I hope you solve your problem
Click to expand...

This worked for me. This solution is also given in the asus b350 prime manual.
 
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Be sure to format USB as FAT32.

I got display in 10-20 sec. It immediately went to update BIOS.

The whole process took about 1-2min

 
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I managed the latest firmware, for anyone else curious, or happens to stumble across this I'll outline what I discovered. Let's just say the info in the manual is incomplete (about par for the course)
I downloaded the latest firmware, placed it, properly named, on a fat 32 formatted hard drive, when I plugged it in I did notice that, at least, the fans cycled down vs staying at full, so SOMETHING, is happening, after letting it sit awhile, just a black screen, but I did notice that the system continually tried to access any other possible boot medium (ssd, hdd, optical) over and over. Unplug all other possible boot medium, and the system booted right into ez flash.

Tl,Dr : unplug everything the system could be trying to access for boot information, sata drives, m.2 drives, optical, everything, and this seems to work just fine.
 
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Strange... i didn't disconnect anything.. but I'm glad you managed to solve your problem 😉

I had the following plugged in:
1. graphic card with monitor via display port
2. m.2 hard disk
3. Optical drive
4. monitor USB hub connected to MBO USB port (the on under display port)
- and keyboard and mice connected to the monitor
5. USB stick with BIOS image connected to the port next to the LAN
 
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From what I can tell, you can use any usb port you want, but depending on which part of the bios becomes corrupted, I could see disconnecting extra boot media becoming necessary (as indeed, it was for me) some may get more "lucky" than others. I'd say to anyone experiencing this, go ahead and try it with everything plugged in, if that fails, disconnect everything but the gpu, ram, and cpu from the motherboard.
 
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Mmm...fell victim of the same issue. Years and years without a single problem, using the same utility - then once that I don't check everything online before flashing, I get a bricked mainboard. Mine (350-Plus) doesn't seem to be able to use the "Crash Free" thing - nothing happens, no matter the version of the BIOS on the Flash drive, which port I connect it to, disconnected everything and so on. The board powers up, the LED go into "breathe" mode, the LED circle on the CPU heatsink flashes for 3-4 seconds, then goes dark; the cycle keeps repeating infinitely as long as the board is powered up. No sounds from the speaker. I'm fairly certain the board is somehow completely dead.
 
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Something a few others did that seemed to help is remove even all but one stick of RAM, the CPU, and the GPU. What tipped me off to what was going on was watching the HDD light when it was connected, you'll see it flash once periodically as something does try to access it. Once I removed all possible boot media (CD ROM, m.2, HDD, etc) all but one stick of RAM, made sure that the USB stick was formatted to FAT32, and the only file on it was the flash named properly, it finally worked. If you've tried all this, sorry, can't be more help, if you haven't, I'd say it's worth a shot. One thing I can say fairly definitively, at least for the prime b350 plus, is it doesn't seem to matter which usb port you use, so long as there is nothing else connected.
 
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Thanks Michael, but I've tried all of that; The board seems to be "cycling" continuously, in terms of trying to power on, failing, and retrying over and over again. I threw everything and the kitchen sink at it - disconnected everything, left 1 RAM bank, tried all four RAM slots individually, tried the DVD boot as the manual describes, about 8 different USB flash drives of various sizes and makes (some over 10 years old USB 1.1 units, some USB 2.0, some brand new USB 3); I even tried with external HDDs and went as far as trying to connect an hard drive with just the PRB350PS.CAP file to all of the SATA ports on the mainboard, with zero success. To be honest I haven't looked at the HDD activity LED, but I would have noticed if it was at least ligthing up every now and then.

Guess "crash free bios" only really means "usually crash free, but if you're unlucky enough..."

 
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That actually sounds like an issue in the voltage regulator or some other portion of the power delivery system, typically if the system powers on and off over and over like this, it's rare you actually have an issue with the bios. I am of course assuming you disconnected all power sources from the board at some point (to include the cmos battery) to attempt resetting any power failsafe mechanisms. If you haven't, that's worth a shot I suppose. Otherwise it sounds as if you have a very good case for hardware replacement by Asus, as if it was indeed an issue with flashing by approved means that did something like cause the board to set it's own voltage limitations too high, it would be asus' responsibility. If you don't mind me asking, did you have this unit set to a higher than default voltage when you attempted to flash? I'm also assuming you tried to flash from Windows...
 
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Mmm...hadn't thought about the voltage regulation point of view, to be honest - I did try leaving the CMOS battery out overnight with all power disconnected, which produced no change whatsoever. I just got a mail back from ASUS support telling me to try, as a last resort, to short the ClearCMOS jumper - which stupidly I didn't to 'til now (It was the first thing I thought about, but I couldn't locate it on the board - turns out it's staring at me in the face just above the SPDIF connector). I will try it when I get home from work later tonight.

As for the voltages, everything was running at the default settings - I had quite literally put the system together a few hours prior to the BIOS update issue manifesting itself and was simply doing the initial setup steps; The reason I went to update the BIOS was that the whole contraption would not boot if the RAM settings were any higher than 2133 Mhz (I have 2xDDR4 2666) and the update was *supposed* to help in these regards :)

I did the flashing through ASUS' AI suite; I would normally prefer doing it directly from the BIOS setup screen or the old "dos boot" mode, but I had used ASUS' utility many times before in the last decade and it always worked perfectly - I was foolish enough to trust it this time. After about 90 minutes stuck at the same level of "progress", it was very clear something had gone horribly wrong...

I'll keep you guys posted, hopefully this thread will be useful to the (undoubtedly) many others incurring in the same issue.
 
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So, closing the case - there's nothing to do; Even shorting out the ClearCMOS jumper, the board doesn't change behaviour at all. I've since replaced it with a working example, now I'll need to get the faulty one RMA'd and I'll likely sell it on eBay once the process is done.
 
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Hi , i already tried to unplug all sata cable form motherboard, i don't use dvd room . and i copied the latest bios update i used in windows before the bios bricked to usb and rename it using asus brenamerl . i plug the usb and power on the system . i can hear one beep sound ( it was double beep before) . but nothing happen , i cant see anything on screen . please someone help me
 
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