New system, finally booting, installed RX480, black screen.

rcolebrook

Prominent
Mar 5, 2017
3
0
510
Evening folks,

So I have finally taken the plunge and started building systems again after a 12 year break. I guess that's what you get for de-skilling yourself by living with a computer science student.

My last system was on life support and finally kicked the bucket so I opted for a mid range build from pc part picker recommended by a friend of mine more in the know.

Specifically this build https://uk.pcpartpicker.com/list/ZkjCqk

Intel Core i5-7400 3.0GHz Quad-Core Processor

ASRock B250 Pro4 ATX LGA1151 Motherboard

G.Skill NT Series 8GB (1 x 8GB) DDR4-2400 Memory

Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive

Gigabyte Radeon RX 480 8GB G1 Gaming Video Card

Corsair 100R ATX Mid Tower Case

SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply

With an added:

SanDisk Ultra II SSD 240 GB Sata III 2.5-inch Internal SSD


Having had some teething problems getting back into the swing of things I used the excellent guide for not booting/black screen PC's and managed to get everything working sans GPU.

Now, having tried to get the GPU working I am having another issue.

When the GPU is in the PCI-E slot and connected to the PSU the pc will not start at all. All fans start spinning but the GPU fans stop within a second or two of powering up and the screen remains black. The GPU displays a white LED.

When disconnected the GPU displays a red LED and the PC starts up normally.

Having gone into device manager there is currently no GPU detected other than onboard graphics. BIOS confirms that the default graphics should be coming from PCI-E.

Things I have attempted:

1). Changed PCI-E slot.

2).Flashed BIOS to version 1.10 found here:

http://www.asrock.com/MB/Intel/B250%20Pro4/index.asp#BIOS

I have gone back into BIOS to confirm the update and the PC is otherwise still working fine.

3). Attempted to play around with UEFI/legacy settings but I am not really clear on what this entails as it is all new to me. I have checked and my mobo seems to currently be set to legacy by default, I tried disabling this and same problem occurs.

4). I have swapped around the PSU leads to ones that were confirmed working but no change.

5). Checked by GPU for some kind of BIOS switch as suggested on various fora but no dice.

This is unfortunately now above my pay grade as a returnee system fiddler. Any help would be much appreciated.
 
Solution
Just a few basic questions, if you don't mind:
Did you connect monitor to GPU when it's powered (when white LED is on)?
Do you have beeper installed? Does it make any sound when you try to start with GPU powered?

rcolebrook

Prominent
Mar 5, 2017
3
0
510


So it appears I am a double moron. Not only was the monitor I was attempting to use VGA (with no corresponding port on the rx480) it was plugged into the mobo. Quick switcheroo later and the display is running and I have installed the radeon drivers.

However, the fans for the GPU are still not running. Not sure if this is design or error.