Recently got a GTX980M shipped in from China that doesn't seem to like my laptop, leaves ugly broken lines all over the screen as soon as the Nvidia driver is enabled. Been trying hard to find a modded VBios and got lucky in finding the Prema GTX980M V2 on some dodgy Chinese site since everywhere else is a dead end including Prema's site which only has a form for signing up to some newsletter, but on enabling the driver resulted in a white screen and crashed the laptop (tried also plugging in a HDMI monitor in case it just wasn't working with the LCD but also no luck.) Can't find out how to access the VBios to set it up, pressing F2 only goes to the default Bios that's already installed on the laptop, so we're thinking maybe we also need Prema's P771ZM Bios but can't find this anywhere.
This is just guesswork, we've hit a wall on everything we've tried outside of returning the gfx card and labeling it as faulty, but that's not a practical option for us as the cost of shipping it back to China will be too much and would mean a 2 month wait for a replacement with no guarantee that one would work also. Would love help in locating Prema's P77xZM Bios or at least help in kicking some life into this card if anyone's come across this kind of issue before and knows how to fix it.