iMac 2010 - dead after Dosdude1’s Mojave patcher (w/gtx 765m)

[kingvald]

Hi, I just installed a Nvidia gtx765m in my 27 iMac mid 2010. After installed everything worked fine with High Sierra install. The card came preflashed so I had bootscreen and could boot from USB. So I decided to try to install Mojave with Dosdude1’s patcher..... big mistake.... the screen went black during install and now it is not possible to boot at all.

When I turn it on there is no boot chime, screen is black and it turns off after 30 sec. It is not possible to boot from usb. I have tried to reset nvram, smc....nothing.

Could the patcher somehow have messed up the graphics card? Any suggestions on what to do?

Thanks

 

[jsusa]

Man, this is a scam.
You probably bought a baked GPU and now it is dead.
You can maybe bake it once more (200 deg. celsius for 8 min max and put a coin on top the gpu chip just for a little weight)) but I am not sure.
Try it, costs nothing since it is dead for you already

 

[Ausdauersportler]

Hi, I just installed a Nvidia gtx765m in my 27 iMac mid 2010. After installed everything worked fine with High Sierra install. The card came preflashed so I had bootscreen and could boot from USB. So I decided to try to install Mojave with Dosdude1’s patcher..... big mistake.... the screen went black during install and now it is not possible to boot at all.

When I turn it on there is no boot chime, screen is black and it turns off after 30 sec. It is not possible to boot from usb. I have tried to reset nvram, smc....nothing.

Could the patcher somehow have messed up the graphics card? Any suggestions on what to do?

Thanks

Make a PRAM reset (or three in a row) and try if you get back the boot screen.

Of course even these old GTX 765M cards can die, but it would be a bad coincidence if this happens during a Catalina installation. Thousands of users modded their iMacs with Nvidia Kepler cards running Mojave, Catalina and now even Big Sur with full graphics acceleration.

Take a look at the first link in my signature to find more information.
The second for Big Sur on your iMac.

P.S.: And this is not a scam, these cards work fine in the Late 2009 to Mid 2011 iMacs.

 

[kingvald]

Make a PRAM reset (or three in a row) and try if you get back the boot screen.

Of course even these old GTX 765M cards can die, but it would be a bad coincidence if this happens during a Catalina installation. Thousands of users modded their iMacs with Nvidia Kepler cards running Mojave, Catalina and now even Big Sur with full graphics acceleration.

Take a look at the first link in my signature to find more information.
The second for Big Sur on your iMac.

P.S.: And this is not a scam, these cards work fine in the Late 2009 to Mid 2011 iMacs.

Thanks for your reply. I managed to successfully install Mojave , forgot to uncheck the legacy video patch and a pram reset didi the trick. Mojave worked flawless but of course I wanted to try Catalina . Now in Catalina I have to reset pram each time the machine reboots, if not the screen stays black..... any fix for this?

Thanks

 

[Ausdauersportler]

Thanks for your reply. I managed to successfully install Mojave , forgot to uncheck the legacy video patch and a pram reset didi the trick. Mojave worked flawless but of course I wanted to try Catalina . Now in Catalina I have to reset pram each time the machine reboots, if not the screen stays black..... any fix for this?

Thanks

First link in my signature.

 

[kingvald]

First link in my signature.

Thanks.... just to clarify... installing the AGC kext will fix the black screen on boot?

 

[Ausdauersportler]

Thanks.... just to clarify... installing the AGC kext will fix the black screen on boot?

It is what we documented there. As much as I understand your new requests. But this does not scale any longer. We have hundreds of people doing this mod and only one to answer the questions. Please start to trust in your own abilities and read and try!