snagsy Posted July 9, 2017 Share Posted July 9, 2017 Hi guys first time posting here. I'm hoping for a little help. I have a m17xr4 quite a few years old now which has gone through a couple of GTX675m's now. So recently I purchased a GTX680m from ebay and after installing I am getting a blank screen, with no back lighting or signs of life.Fans/Lights run and I hear windows start fine, but I'm unable to switch to internal graphics after pressing the Fn F7. If I hit enter I hear an error menu so something pops a new window up. If i remove the GTX680m it displays fine with its internal hd4000 graphics. I have been speaking to the seller and found that the card is from the M17xr4 120hz wide FHD 3D. My model only has the 60hz screen but I didn't think this was a concern. With the card fitted the GTX680m warms up a little. I removed the Nvidia drivers before installation through the control panel. I have tried Blind flashing the vbios with a stock bios sent from the original owner and also one from techpowerup with no change. I used nvflash v5.14.1 Dos version, I get 1 chime when I press 'y' 20 seconds in and get another chime 20 seconds later so I feel it has flashed but cant be 100% certain as I cant see. Any help is greatly appreciated. Many thanks. My specs: Win 7 home premium Processor i7-3720QM 2.6Ghz A12 BIOS stock 8GB Ram originally a GTX675m which recently died 17.3" wideFHD (1920x1080) WLED LCD non 3D Quote Link to comment Share on other sites More sharing options...
b1naryx Posted July 13, 2017 Share Posted July 13, 2017 Hopefully someone else with some more knowledge can chime in, but I agree that it shouldn't matter if it was originally from a R4 that had the upgraded display. It sounds like it's been flashed too but other than a weird driver issue, I'm not sure what the issue could be :/ Quote Link to comment Share on other sites More sharing options...
H658tu Posted July 14, 2017 Share Posted July 14, 2017 The 120Hz/3D screen will only run on pure dGPU, so no Intel HD via Enduro/Optimus. Likely the original vbios and the one from TPU are for dGPU-only setups. The R4 has a mux switch, so you can force dGPU in the bios or using Fn+F7. If you're intend on running Optimus then you need to flash a vbios version that can handle switching. Could research which one will work or just resort to trial&error. 1 Quote Link to comment Share on other sites More sharing options...
snagsy Posted July 19, 2017 Author Share Posted July 19, 2017 Thanks for the reply's. I managed to get it to operate by a fresh reinstall then loaded the drivers from my factory CD, that seemed to get optimus partly working. This allowed the computer to recognise the gtx680m in device manager so I could install the drivers for it. The card is operating alongside the hd4000 when I look in afterburner, but if I switch graphics with Fn F7 to the 680 only, I still get a black screen only. Current Bios is 80.04.33.00.32 now I can see it. Quote Link to comment Share on other sites More sharing options...
H658tu Posted July 22, 2017 Share Posted July 22, 2017 Yes, you need to flash a vbios that is capable of iGPU-dGPU switching. Quote Link to comment Share on other sites More sharing options...
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