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M17xR4 Upgrade to Gtx680m Blank Screen


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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

 

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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 :/

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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.
 

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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.

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