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Powers Up but won't boot to BIOS

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August 9, 2013 7:20:25 PM

Hi Y'all.

Yesterday I installed the ASUS F2 A85-V Pro using the FSP Hexa Series HE 500 ATX PSU, and I'm having issues with the mainboard not powering up if both ATX power connectors are plugged in.

Specifically, if the EATXPWR and EATX12V connectors are plugged in, the mainboard won't even power up. If I leave the EATX12V coupling unplugged the mainboard does come online but nothing else...no BIOS nor even the monitor wakes up.

In reading the F2 A85-V Pro user guide it states the board won't boot unless the EATX12V is connected.

My question to this forum is in hopes that some of you have experience with this mainboard and can tell me if you've connected both the EATX12V and EATXPWR connectors (both listed as #1 in the user guide) powering up the mainboard to the BIOS level?

Additionally, my ATX PSU is rated 80+ Efficiency with a peak power of 550W. The F2 user guide says the PSU needs only 450W.

Any tips, thoughts, suggestions, etc., are greatly needed and appreciated.

Thanks.
Cole

More about : powers boot bios

a c 559 V Motherboard
August 9, 2013 10:06:32 PM

Hi, What CPU using?
Try taking the board outside the case. Put it on its cardboard, install minimum components and test.
For starting, both 24 and 8-pin power cables have to be connected.
The 8-pin provides power to the CPU.
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August 9, 2013 10:37:22 PM

alexoiu said:
Hi, What CPU using?
Try taking the board outside the case. Put it on its cardboard, install minimum components and test.
For starting, both 24 and 8-pin power cables have to be connected.
The 8-pin provides power to the CPU.


This is a good idea. I'm thinking of buying a 700W PSU in case the 500W isn't supplying enough, but it's $100 USD and non-refundable should it not be the problem.


The thing is I'm a computer engineer and have been out of my field for 11 years. Now I'm ready to get back into the swing by making this a hobby, but here in Thailand what you buy is yours, which makes this a VERY expensive hobby. :-D

The CPU is the AMD A10-6800K.
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a c 559 V Motherboard
August 9, 2013 10:42:47 PM

The 6800k requires the 6002 BIOS version.
On the motherboard there should be a barcode sticker. The last 4 digits on that sticker stand for the BIOS version.
Check if the CPU is supported by the board's BIOS.
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August 10, 2013 2:28:03 AM

alexoiu said:
The 6800k requires the 6002 BIOS version.
On the motherboard there should be a barcode sticker. The last 4 digits on that sticker stand for the BIOS version.
Check if the CPU is supported by the board's BIOS.


Thank you VERY much for your assistance, alexoiu. I found the problem, and it was a bit sad. The power supply I had purchased, FSP Hexa Series HE 500 ATX, was the cause of the mainboard not booting up. :( 

I purchased a Raidmax RX730SS ATX 2.2, and after installing it the system booted right up. Now either the FSP Hexa HE500 wasn't enough power, or there was an unseen issue with the PSU itself. In my profession as a computer hardware engineer I would have had plenty of extra parts and would have found this issue fairly quickly, and without the need to seek assistance in hopes it wouldn't cost me more money. All-in-all it only cost an additional $75 USD which is somewhat cheaper than I had been ready to pay. :) 

Again, thank you very much.

Best regards,
Cole
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a c 559 V Motherboard
August 10, 2013 2:34:18 AM

No problem. Glad you've solved it.
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