Hello all,
 
 I am new and have no idea what i am doing but here goes, I have an Alienware area51 7500 gc running an EVGA NFORCE 680I SLI MB. My problem started last week where the pc will not boot, i hear the fans running and when i open the door i see this code on the MB - - indicating no code at all.
 
I have managed to reboot several times by removing the vis cards or disconnecting the Hard drive com cable but sometimes this does no good.
 
when it boots i hear the beep and i see it running through the codes until it reaches the FF code and all is well, if i shut down and try to re-boot sometimes it will and sometimes it wont but when it wont i never see an error code just the - - .
 
Any insite would be greatly appreciated, keep in mind i am not technicly sound so please use noob language.

Thanks for the info, how long should a mobo last this rig is like 2 years old?

Know this post is month old but just want to add a few things.

First thing I would do is take a air can and blow off the inside of your system if there is a lot of dust since your -- problem seem to be intermittent.

On the 680i the -- on the board is also known to be caused by a memory problems. Either the memory sticks or the memory controllers getting weak.
You can run memtest on the memory if you want to test the memory.
http://www.memtest.org/
either .exe for floppy or .iso for CD

Not sure what version of windows you are using but Vista and Windows 7 have a built in memory diagnostic test as well, which might be easier for you to use. Click on the Start Button, type memory in the search field, and then click on the Memory Diagnostics Tool when it appears. It will tell you you need to reboot and then it will start the memory tests.

Also you may want to read over this post and give these steps a try, these steps have saved a lot of peoples boards from what seemed like death.
http://forums.evga.comarchive/tm.asp?m=169747
Also try them more then once if they did not seem to work as some people have needed to do them 14 times before the board comes to life.

3D-ICON
If Code -- is not starting the POST cycle than what is Code 00? because my z490 wifi is defiantly not posting. i hope its not what ive been told cause a i9-10k isnt cheap.
 

Sorry just saw the notification for this post just now.
Is this a new build or a system that has been up and running for a while?
If it's a new build I'd take everything out of the case, put the motherboard on a piece of cardboard and try putting the basics in it and then booting it up. A MB that is shorting out on a misplaced stand out can cause an issue like this.  A CPU heatsink that is over tightened as well as it warps the MB around the socket can also cause an issue like this.