Acer monitor not recognising R 280x

[GiskardR]

Hi there Tom's Hardware, I need your help please.

My venerable 470gtx died a few days ago, and after much wailing and gnashing of teeth, I decided to bite the bullet and upgrade to a Sapphire 3gb R9 280x card.

Now it's all installed, seated correctly and connected to the PSU, but when I connect my Acer S243HL monitor, there is nothing apart from the "cable not connected" message dancing around the screen, mocking me.

I've tried installing the card into a different PCI-e slot and I have tried 2 different brand new HDMI cables but to no avail.

Motherboard is only 6 months old, an Asus M5A97 and I have a brand new Cooler Master v850 as a power supply

I really hope you guys can help.

 

[i7Baby]

Try the other connectors on the monitor and the 280x

Have you installed the card's driver? And uninstalled the gtx's?

 

[GiskardR]

I've tried the different ports on the monitor and the card has only 1 HDMI port. Can't install the driver, as I can't boot the computer as the monitor won't even display the POST screen just that "cable is not connected" message.

Gtx driver has been uninstalled.

 

[i7Baby]

You got the power supply connectors on the 280x?

Go through Tom's checklist - http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[GiskardR]

Yes, there is power going to the GPU, all necessary cables are installed.

I just put my 470gtx back in, and the monitor detects that, the "cable not connected" message goes away, but no luck with the new card.

 

[i7Baby]

If you've got another pcie slot you can put the 280x in and download and install its drivers. Then pull out the gtx and put the 280x in its spot.

 

[GiskardR]

I'll give that a try, thanks very much

 

[GiskardR]

Tried your solution and still no dice. I suspect a faulty card, as that "cable not connected" message would turn off if the monitor detects any video card even if the computer is off.

 

[i7Baby]

It's starting to look like that. Can you try it in another pc?

 

[dkulprit]

Are the fans spinning? Any beep code errors?

Do you have an on-board vga?