Sorry my en so bad ! The current state Forget to nand backup . choose boot custom FW or boot original FW stop the Nintendo Switch logoMaybe you will get an answer if your messages are longer than five words and maybe with a little more information.
I'm not a Pro in this case, but I know from the topics I'm familiar with that I wouldn't help if the person who needs help never takes 5 minutes to write a sentence about where the problem is, including any information that might be needed. And I use "might", because I would provide all the information I can, to make it easier for the people who help.
The English language should not be a problem either. I am German myself and all this has been translated for me by a translator. -> www.deepl.com
How long did you wait, when it was at the switch logo? You have Emunand enabled. Try to disable emunand by clicking on the orange pop up, where it says "emunand enabled", so it should get disabled and then boot again cfw. If it boots, your emunand is faulty.
is long long time(One night)wait the logo 。 I think nand is faultyHow long did you wait, when it was at the switch logo? You have Emunand enabled. Try to disable emunand by clicking on the orange pop up, where it says "emunand enabled", so it should get disabled and then boot again cfw. If it boots, your emunand is faulty.
all for test , Including replacement of sd cardmaybe you did not plugged the nand very well. try to disassemble again your switch and look if the nand is plugged in its slot properly.
Did you also try to boot the cfw without emunand?
The first runing is successful( boot custom FW ) ,forget to nand backup 。second choose ( boot original FW ) boot is Black screen 。power off after stop the switch logo 。can you please say more what you did? i cant help or no one can help if you just say few words without proper information what you did.
Do you know what? Format your MicroSD Card as FAT32 and try again to boot to CFW. Before formatting, backup your emunand and sysnand.
boot to the bootloader is ok(no problem).Can you boot to the bootloader? You can boot to it by pressing the volume + and power button. Release it after you see the SX logo.