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ASUS Crosshair VI Hero, Q-code 8, unable to boot

post #1 of 8
Thread Starter 
Hi everyone! Hoping that someone in here can help me with my boot problem - my computer will not boot.

The motherboard (ASUS Crosshair VI Hero) does not POST, and is stuck on Q-code 8. CPU_READY light is green, but no Q-LEDs are lighting up. I've tried everything to make it POST again.
Reseating CPU, trying to boot without RAM or just one RAM stick in slot A2, safe boot button, clearing CMOS (using button, or pulling the battery out for 15 mins), (successfully) re-flashing BIOS (have tried 1002 and 0082) through USB BIOS Flashback will not make it POST. I have also tried to loosen the AIO watercooler (Corsair H100i v2) a bit.

The only thing that happens when trying to start the computer is code 8 and no POST. The "Crosshair VI" RGB LED is stuck on red, and doesn't cycle colours anymore.
My computer ran fine until a couple of days ago, when random crashing with code 8 started (using BIOS 1001 and then 1002). Today it can't boot at all - it can only show the green CPU_READY light and Q-code 8, without any Q-LEDs.

CPU is a Ryzen 1800X (no bent pins or anything - it looks fine). Stock CPU clocks and stock RAM clock (Trident Z RGB 3600 MHz 2 x 8 GB @ 2133 MHz).

I'm thinking that the motherboard has died.
Is this a CPU or motherboard related problem, and is there anything else I can do to make it boot/POST, or should I do an RMA?
post #2 of 8
Take out the mobo, place on box and try to boot with just the essentials...
 
BitoHeaven
(16 items)
 
Cigar ATX PC
(14 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 4770k @ 4.5GHz Asus Maximus VI Gene Gigabyte R9 290 @ 1160MHz/1350MHz Gigabyte R9 290 @ 1160MHz/1350MHz 
RAMHard DriveHard DriveOptical Drive
G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
CoolingOSMonitorKeyboard
Liquid Single Loop Triple Radiators Win 7 SP1 Professional x64bit  Samsung SynchMaster 24" Widescreen 1200p TFT-LC... Logitech G15 
PowerCaseMouseMouse Pad
EVGA SuperNOVA G2 1300w 80+ Gold Fully Modular  Fractal Design Arc Midi R2 Microsoft Sidewinder X5 Allsop Redmond Mouse Pad 
Audio
Cambridge Soundworks 5.1 
CPUMotherboardGraphicsRAM
Intel Core i5-3570K @ 4.6GHz ASRock Z77E-ITX mITX  Sapphire HD 7990 @ 1090MHz/1600MHz G.SKILL Ripjaws 2X4GB DDR3-1600 @ 1866MHz 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD 128GB mSATA SATA III 6GB  Seagate Barracuda 7200.12 1TB SATA II 32MB 7200RPM LG DVD R/W SATA with LightScribe Corsair Cooling Hydro Series H100 
OSMonitorKeyboardPower
Win 7 Professional x64bit Samsung 52" 1080p 60Hz LCD Logitech Wireless K330 Corsair AX850 Gold Fully Modular 
CaseMouseMouse PadAudio
BitFenix Prodigy Mini-ATX Black  Logitech Wireless M215 Corsair Vengeance MM200 Yamaha RX-V681 & PSB/Polk Audio 5.1 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 640 ASRock N68C-GS NVIDIA 6600GT G. Skill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
WD Caviar Blue 500GB 16MB Cache 7200RPM LG Optical Drive Thermaltake Max Orb Windows 7 
MonitorKeyboardPowerCase
Viewsonic 19” Flatscreen CRT Gigabyte GK-K6800 103  Thermaltake TR2 600W Cigar Boxes 
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Zalman ZM-M300 Corsair Vengeance MM200 
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BitoHeaven
(16 items)
 
Cigar ATX PC
(14 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 4770k @ 4.5GHz Asus Maximus VI Gene Gigabyte R9 290 @ 1160MHz/1350MHz Gigabyte R9 290 @ 1160MHz/1350MHz 
RAMHard DriveHard DriveOptical Drive
G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
CoolingOSMonitorKeyboard
Liquid Single Loop Triple Radiators Win 7 SP1 Professional x64bit  Samsung SynchMaster 24" Widescreen 1200p TFT-LC... Logitech G15 
PowerCaseMouseMouse Pad
EVGA SuperNOVA G2 1300w 80+ Gold Fully Modular  Fractal Design Arc Midi R2 Microsoft Sidewinder X5 Allsop Redmond Mouse Pad 
Audio
Cambridge Soundworks 5.1 
CPUMotherboardGraphicsRAM
Intel Core i5-3570K @ 4.6GHz ASRock Z77E-ITX mITX  Sapphire HD 7990 @ 1090MHz/1600MHz G.SKILL Ripjaws 2X4GB DDR3-1600 @ 1866MHz 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD 128GB mSATA SATA III 6GB  Seagate Barracuda 7200.12 1TB SATA II 32MB 7200RPM LG DVD R/W SATA with LightScribe Corsair Cooling Hydro Series H100 
OSMonitorKeyboardPower
Win 7 Professional x64bit Samsung 52" 1080p 60Hz LCD Logitech Wireless K330 Corsair AX850 Gold Fully Modular 
CaseMouseMouse PadAudio
BitFenix Prodigy Mini-ATX Black  Logitech Wireless M215 Corsair Vengeance MM200 Yamaha RX-V681 & PSB/Polk Audio 5.1 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 640 ASRock N68C-GS NVIDIA 6600GT G. Skill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
WD Caviar Blue 500GB 16MB Cache 7200RPM LG Optical Drive Thermaltake Max Orb Windows 7 
MonitorKeyboardPowerCase
Viewsonic 19” Flatscreen CRT Gigabyte GK-K6800 103  Thermaltake TR2 600W Cigar Boxes 
MouseMouse Pad
Zalman ZM-M300 Corsair Vengeance MM200 
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post #3 of 8
Thread Starter 
I've already tried that, and still just code 8 and no POST... Going to RMA the board tomorrow.
post #4 of 8
are you using the factory back plate?
post #5 of 8
Thread Starter 
Yes, I'm using the original back plate, with a Corsair H110i v2 AIO cooler.
post #6 of 8
Thread Starter 
RMA didn't help me. But found out that the tape with glue on the original AM4 backplate was the culprit. Now the board is up and running again, after I peeled the tape off the backplate.
post #7 of 8
When you say "tape with glue", on the backplate which came with the C6H, do you mean that whole plastic sheet (it looks like teflon, but I doubt it is) covered with sticky glue / double-sided tape on both sides? I only have one PSU which is making this entire diagnostic process difficult.. I have to keep swapping out the whole system for each test.

I also noticed that under the backplate, on the motherboard, there is an outline of a rectangular piece of tape around each of the four screw holes for the backplate, which do not correspond to anything on the backplate. Suggesting that there used to be something else mounted there. Should I try cleaning it? Will isopropyl alcohol hurt the board?


Test without backplate:

Nothing connected to motherboard except for ATX connector, 8-pin CPU power, and Ryzen 7 1700. Backplate removed, front panel not connected, graphics card not connected, no cooler, no fans. I have not attempted to clean the motherboard with anything, neither isopropyl alcohol nor soap solution. I turned the system on for no more than 3 or 4 seconds each time, since the only CPU heat sink was the package lid.

With no RAM modules, and only one module in each of the four slots.

Motherboard resting on nothing but air, held aloft with one hand by only the plastic shroud around the backplate connectors.

CPU re-seated multiple times.

Every time, same results: CPU indicator is green, Q-code is an 8 (not a 08, just 8). RGB LEDs on the board light up and cycle colors.

Please tell me what I should do. I would rather not have to RMA because I suspect I will just have the same problem with the replacement and I'd rather not deal with that. But if I do have to return something, I have not the faintest clue as to whether it should be the CPU or the motherboard. What's going on?


Well no replies here after 23 hours, so I've submitted a support request with Asus for the motherboard, I will update if I get it working. Sure enough, the reply says I should RMA, so I'll do that.
Edited by Aru3 - 6/10/17 at 4:43pm
post #8 of 8
(deleted)
Edited by Aru3 - 6/9/17 at 9:32pm
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