Nintendo switch, port is perfect but not charging and no display. LET'S DIVE IN! 

Yes i had the same problem rcm mode .

How to inject payload?

Wow, that worked! I thought mine died. This is my second unpatched switch from ebay and I had sent the first one in for repair, thinking it was dead. Long story short, they couldn't repair it and I told them to recycle it. Looking back, I might have made a mistake and threw my money away. On this second switch, I gave what you said, a try (with nothing else to lose and thinking it's crazy and wouldn't work) and the missing SD card Hekate launch screen came up. So happy right now. These late night RU-vid binges have paid off! Thanks and thank you RU-vid algorithm, it's like you know my problems even though I didn't look for the answers. Now I'm really confused. Could it be that the first switch I had was fine this whole time and it was some AutoRCM power on issue?! Or could there still be problems with the switch that will lead up to a permadeath of the console. Oh well, at least I still have a new and unused OLED that I can send in to have it chipped and hope third time's a charm where I have a switch that will last more than a year.

How to kick it out?

This is correct

Not necessarily. You can connect it to another switch that is unpatched or chipped and dump it. And rebuild it if there is any missing partitions. The last resort is to use a donor prod info to rebuild the emmc but lose access to the eShop. Watch "StheTix" vids he has tutorials.

You can use mmcblkNX to confirm if the nand is faulty. I used it on mine which was from an unpatched switch and confirmed it was a nand issue, so bought a replacement nand and restored it with a firmware rebuild.

www.aliexpress.com/item/1005004796942121.html?spm=a2g0o.order_list.order_list_main.195.504018020G9VsF

Have u been successfull?

My experience is the polar opposite of what you described. I'm not sure what all you've watched, but he has tons of videos where he goes into great detail on what he's doing, and why.