M5100 graphic (red) on Precision M4700 instead of M4000 no display

Hello,

I read a post on this case of red Firepro M5100 graphic board not running on the Precision M4700 on this forum.
Interesting, very interesting.

So the pb I have now is when I put the original Firepro M4000 I got the same troubleshooting : I heard the fans for 3 seconds and the laptop shutting down. Exactly as if I had the incompatible red Firepro M5100.

I don't know what to do and need help.

Thanks, regards,

Fabrice

 

Hello, did you try a clear CMOS by removing the CMOS battery?
I found this link
Of course unplug the power adaptor and remove the battery before doing it!