Hey guys, so up until now, this machine has given me nothing but trouble. At first the motherboard would hang randomly during BIOS, then it kept scrambling boot order around, and now this. After I got it running, a week later it fails to boot and stalls at the Q-code B4, or «USB Hot plug».
At first, I saw this before the hang:
Code:
Code:
USB Device Found: Generic-CompactFlash 1.01Normally, after this, it lists all the USB devices, which includes the front panel card readers and keyboard+mouse, plus some things like «AMI Virtual Floppy0». So I disconnected my front panel card reader, since that’s where it hung up, and restarted. Still error B4 but with nothing showing.
I have removed every USB device from the system, including the keyboard and mouse, and switched to a PS/2 keyboard, but it still hangs at B4 every time…
Motherboard is ASUS Z10PE-D16 WS with two Xeon E5-2650 V3’s.
Try updating the BIOS to the latest version and clearing the CMOS.
If it still gives you issues, I think that you might have a defective motherboard. The USB controller looks like it’s problematic.
Are you still in the return period? I’d consider the possibility of getting it exchanged for a good one.
It’s 2 days past of the return window.
I’ll try clearing the CMOS. Part of me thinks those AMI Virtual USB drives have something to do with this, but there’s no way to disable them if I can’t access the BIOS setup.
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I’d recommend you contact the seller and see if you cannot arrange for something. Usually if it’s a couple of days, they won’t freak out. Ask about bringing them the system in maybe.
Another option is to RMA back to Asus. Make sure you take extensive pictures though, as Asus RMA can be problematic. I’d check to see if there is a Z10 club here on OCN as well and ask about it, along with their support forums.
Quote:
Originally Posted by CrazyElf
I’d recommend you contact the seller and see if you cannot arrange for something. Usually if it’s a couple of days, they won’t freak out. Ask about bringing them the system in maybe.
Another option is to RMA back to Asus. Make sure you take extensive pictures though, as Asus RMA can be problematic. I’d check to see if there is a Z10 club here on OCN as well and ask about it, along with their support forums.
The seller was Amazon, but I suppose I can still contact them about it.
Could you point me towards the Z10 club thread? Which forum would that be in?
Possible solution — Worked for me.
I have experienced this issue as well, and I may have the solution.
For me, it was also hanging in boot with «Press F2 or Del to enter BIOS» longer than normal, i normally dont see it for more than 1 sec, if that long.
Not it was there for about 20-30 secs, and ends with «Error. Press F1 to enter BIOS»
It all began when I bought a new keyboard from Corsair, but even when I unplugged it, it still had the error.
I also have had a SSD disc attached temporary the day before, so I thought it may have been me interfeering with my existing drives, that made the error.
I read as well that it was due to USB the error came.
However after having tried alkot, I noticed than when entering BIOS with F1, it always displayed a wrong date. Like 1900 or something (don’t have pictures, sry.)
Then I knew what was wrong…
All my computerparts are connected to same power output, and I always switched it off, to shut down printers etc.
I bought a packet of CR2032 batteries, and changed the one on the motherboard (also a CR2032)
After that new battery came in, my problems were gone.
Cheap and simple way to try out.
Hope this helps others.
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I have experienced this issue as well, and I may have the solution.
For me, it was also hanging in boot with «Press F2 or Del to enter BIOS» longer than normal, i normally dont see it for more than 1 sec, if that long.
Not it was there for about 20-30 secs, and ends with «Error. Press F1 to enter BIOS»
It all began when I bought a new keyboard from Corsair, but even when I unplugged it, it still had the error.
I also have had a SSD disc attached temporary the day before, so I thought it may have been me interfeering with my existing drives, that made the error.
I read as well that it was due to USB the error came.
However after having tried alkot, I noticed than when entering BIOS with F1, it always displayed a wrong date. Like 1900 or something (don’t have pictures, sry.)
Then I knew what was wrong…
All my computerparts are connected to same power output, and I always switched it off, to shut down printers etc.
I bought a packet of CR2032 batteries, and changed the one on the motherboard (also a CR2032)
After that new battery came in, my problems were gone.
Cheap and simple way to try out.
Hope this helps others.
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Here is the current setup:
CPU: Intel i7-4770K
Motherboard: ASRock Z87 OC Forumla/ac
RAM: G.SKILL Ripjaws X Series 4GB DDR3 1866
GPUs: ASUS Radeon R9 290 (x2)
PSU: SeaSonic Plantinum 1000W
I was testing it by booting Xubuntu 13.10 from a flash drive. The board seemed to have trouble with the 290s even after updating to the latest BIOS. If I tried setting the default graphics adapter to PCIE in the BIOS, I wouldn’t get any video from either card’s HDMI, but I could still SSH into the OS. I don’t know if that issue is related.
Yesterday the system just stopped booting entirely. It now stalls with the B4 USB hotplug error no matter what I do. Unfortunately, I don’t have a spare PSU to try, but given the error code and the fact that all the fans (even on the GPUs) seem to be working normally, I don’t think the PSU is at fault.
Does anyone have any recommendations? The other threads that I have found about the error code don’t seem related to my problem. They involved problems when USB devices were attached to the system. In my case, removing all USB devices doesn’t allow the system to boot. Is it time to RMA the board?
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Тема: не запускается система, ошибка B4. Мать X99S SLI PLUS (Прочитано 9309 раз)
B4 связана с проблемой устройства подключенного к usb
При запуске зависает на черном экране в правом нижнем углу написано B4 и ничего не происходит.
Что только не делал, все устройства из usb вытягивал, пробовал перекидывать на usb 3.0 клавиатуру (до этой проблемы в 3.0 не работала)
вытягивал батарейку на 5 мин, и без жесткого пробовал, все равно зависает на В4
Биос никогда не пробовал обновлять, переустанавливать. Не знаю, поможет это или нет
[вложение удалено администратором]
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Кард ридер никакой не подключен?
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все отключал, все usb свободные
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и внутренние, и которые на переднюю панель идут, с мамки повытыкивал
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Попробуйте с другой клавиатурой, обновите биос, если не поможет тогда нужно будет обратиться в сервис.
« Последнее редактирование: 11 Июль 16, 09:14:34 от zek.83 »
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Отдел технической поддержки MSI — RUSupport@msi.com | Гарантийные сервисные центры MSI — Адреса
единственное биос не обновлял, но как его обновить, если комп не запускается, а клаву менял, и 2 мышки менял. И ставил жесткий, видюху и блок питания на другой комп, работают.
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Тогда остаётся обращаться по гарантии 
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Hi guys,
I hope someone can help me!
I purchased the X470 ROG Crosshair VII Hero board with an AMD 2700X and 16GB of G.Skill 3600MHz CAS 16 RGB Ram.
The rest of the system is: MSI GTX 1080Ti Gaming X, Samsung 850 Evo 500GB SATA M.2, 250GB 850 Evo SSD and a 1TB WD Blue HDD.
I am running Windows 10.
So basically, every now and then — way too often to be honest — when I boot my PC up from off, it will stick on the screen for bios (the one where it says press DEL or F2) and stays there forever. The mouse and keyboard aren’t active so now way to do anything other than hard power off.
I have tried disconnecting all USB devices (including the front panel for the case), removing one stick of Ram, clear cmos, the 2 pin bios reset (with a screw driver), and just about everything else!
My bios is the latest (0702) but this has been happening since day 1.
Somtimes it will boot up just fine and others I will be restarting, clearing cmos, resetting everything over and over for hours just to get back to WIndows.
I am now at the point where I don’t shut my PC down… Ever. Which is wrong when I have just dropped £750 on this upgrade,
This is my first Asus or ROG board and so far I am just frustrated and starting to wish I’d stuck with MSI!
Any help would honestly be very much appreciated!!
All the best,
Iain.
Go to techsupport
MSI B550 Unify-X unable to clear code b4
MSI B550 Unify-X
Ryzen 5600G
32gb of Gskill 3600
All I want in life is to turn off my motherboards bright red motherboard debug LED. Usually it shows CPU temp, but if you toggle that off its supposed to turn the whole light off, assuming there’s no error codes.
Mine is ALWAYS showing code b4, which is USB hot plug. It shows even if I post with no USBs plugged in. Also, literally everything else I can find on the «USB hot plug» code, is everyone that doesn’t actually have a functioning PC because of the code, but my PC runs PERFECTLY and every USB port works flawlessly.
But the stupid code won’t go away.. I’ve uninstalled every USB thing from device manager and let windows reinstall them, I’ve booted without any USB plugged in, I’ve updated the bios to the latest non-beta version, and I’ve tried booting with all my front panel usb headers unplugged, as well as everything plugged into the motherboards USB headers unplugged…
Any help would be GREATLY appreciated. I’m losing my sanity over a stupid red light 😂