Samsung Np-r610h black screen

[passete]

Samsung Np-r610h black screen
complete reference Np-r610-as02fr
motherboard lyon-ext

Turns ON, gpu/cpu/chipset are hot after a few seconds, but no usb, keyboard or other activity, screen is black.
Made a real reflow of gpu and light reflow of other 2 bga's, no change.
Now i'm searching a Bios, dump or original ...

Thanks

[passete]

Re: Samsung Np-r610h black screen

Anyone from the experts to help ?
PS: i've found a dump for the r510, there is no change, turns ON but Black Screen

[ridamouh159]

Re: Samsung Np-r610h black screen

¨Turns ON, gpu/cpu/chipset are hot after a few seconds¨¨

ce n'est pas un probleme de bios
c'est un probleme de cpu-gpu ie vga
la solution existe soit dans le rebiling soit en changant le chip vga