Black screen with cursor, Big Sur, Geforce GT 730 4Gb (MSI)

Hello I assemble a system with: - Motherboard: Asus TUF Z390 Plus Gaming Wifi - Processor: i7-9700F 3.00 GHZ - RAM: 64gb - Disc: SSD 480gb sata - Bluetooth and wifi: Youbo PC dual band wifi card. - iGPU: Intel UHD Graphics 630 - GPU: MSI Geforce GT 730 4gb - OS: Big Sur

Everything works quite well the only problem I that I need to start the HDMI monitor after boot, otherwise do random things. Before I was using a GTX 780 as discrete GPU but suddenly fails (I removed from another PC) and start using the iGPU. But now I get an MSI Geforce GT 730 and even if dortania says the GT 730 is supported the only thing i get after the apple logo and progress bar, is a black screen and the only thing I see is the cursor that I can move around both screens. I try the DVI-D, VGA and HDMI connections and the same result. Only seems to works when I plug to the Display port of the iGPU and the HDMI in the GT 730 but only when I mirror the screen (DP)

I change my config.plist and erase the patch for the iGPU but the same results.

Any suggestions? I don't know what changes I could do.

Best regards.

PS. Sorry for my english.

submitted by /u/Specialist-Reach-378
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