Extreme4 A2/A6 error

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Aug 26, 2011
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Hi everyone, I am currently building a computer but I'm having a few problems getting it going.

Here's what I've tried in order:

Yesterday I installed all components including:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-3770 3.4GHz Quad-Core Processor (£203.99 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£25.20 @ Aria PC)
Thermal Compound: Antec Formula 7 Nano Diamond 4g Thermal Paste (£8.92 @ Scan.co.uk)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard (£79.64 @ Amazon UK)
Memory: Corsair Vengeance 16GB (2 x 8GB) DDR3-1600 Memory (£122.59 @ Scan.co.uk)
Storage: Samsung 840 EVO 250GB 2.5" Solid State Disk (£109.99 @ Amazon UK)
Case: Cooler Master Storm Enforcer ATX Mid Tower Case (£74.38 @ Scan.co.uk)
Case Fan: Cooler Master Megaflow 110.0 CFM 200mm Fan (£9.99 @ Ebuyer)
Power Supply: Corsair RM 650W 80+ Gold Certified Fully-Modular ATX Power Supply (£85.49 @ Ebuyer)
Total: £720.19
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-23 15:47 GMT+0000)

Samsung spinpoint T3 2TB HDD
Random Iomega 1TB HDD
Radeon HD6870
audigy soundblaster sound card.

So everything was installed and I attempted to turn it on for the first time. It turned on but wouldn't boot from my previous primary HDD which I think was to do with the drivers installed on it.

Today I decided to boot it with just the SSD to install windows 8.1 on it.

Again it did turn on but then after selecting to boot from USB it just stopped at a flashing cursor.

I then tried CD same problem and for HDD that I tried after.

So it wasn't booting from any device.

At some point after that I clicked the clear CMOS button on the back of the board and since then I haven't been able to even get to the BIOS screen and the error code A2 is displayed, When I press delete the error code A6 is displayed.

Now I'm not really sure what to do because I've tried everything I can think of, even switching SATA cables and leaving all SATA devices unplugged.

If anyone can help I will love you forever :p (sorry for the long explanation)
 
Solution
do this..pull the gpu and one stick of ram. see if the system will post on the onboard video without any error.
if it does check the bios rev of the mb make sure it at the newest rev to rule out bios bug. with it running with one dimm try installing windows 8.1 if it installs fine then power off the pc and then install the ram first. then see if the system is stable. if it stable then plug in the gpu. on the mb make sure the 4/8 pin cpu power plug is still plugged in.
do this..pull the gpu and one stick of ram. see if the system will post on the onboard video without any error.
if it does check the bios rev of the mb make sure it at the newest rev to rule out bios bug. with it running with one dimm try installing windows 8.1 if it installs fine then power off the pc and then install the ram first. then see if the system is stable. if it stable then plug in the gpu. on the mb make sure the 4/8 pin cpu power plug is still plugged in.
 
Solution

Grindle

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Aug 26, 2011
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18,510
Got the UEFI up doing what you suggested but then still couldn't boot from the usb or cd. First I used unetbootin to make the usb but since I've found the official windows 7 usb creator it's now working! So a combination or bad boot device and random hardware issue Thanks so much :)