In the process of disassembling things to place that jumper perhaps you
lossened the monitor cable or even jostled the video card. Go through and
make sure everything is seated (though you most likely have done that).
Power down and let things sit, with power cable NOT plugged into wall power
for about 20 to 30 minutes. Then plug it in and power back up. If that does
not work, find the motherboard manual and use their "When all else fails
RESET" method.

Given that the BIOS you have is the latest release, I would go ahead and
monkey with that jumper and flash it. Unless you hear something bad about
the version to which you are change, it's usually a good thing to be upto
date.

--
The personal opinion of
Gary G. Little

"PhilTheGap" <oriane@noemail.noemail> wrote in message
news:62BC5AF8-DF03-405B-8C1F-E65D7CF79E32@microsoft.com...
>
> "PhilTheGap" <oriane@noemail.noemail> a écrit dans le message de
> news:ujpL0WltIHA.3968@TK2MSFTNGP04.phx.gbl...
>> By the way, do you think that flashing the BIOS could fix the problem ?
> I've tried...for the worse.
> I explain: I've downloaded this
> http://drivers.softpedia.com/get/BIO...BIOS-11f.shtml
> for my Elite RX480-A motherboard. Then the BIOS has been upgraded but the
> flash fails because I had to set a jumper beforehand on the motherboard.
> I've decided to wait, then after a while I reboot.
>
> Now he PC is running but nothing at all appears on the screen. I'm stuck !
> I don't know what to do (I wrote from my office laptop).
>
> What I don't understand is that I didn't flash anything...
>
> Philippe