Hi.
Some time ago I had a problem with a V1 Switch that had the Orange Screen error after installing Picofly. If I launched atmosphere, it displayed the 2 Atmosphere screens (text and logo), and then Black Screen, and after some seconds, Orange Screen. If I booted System Firmware bypassing picofly and hekate pushing VOL+ & -, black screen and then Orange Screen.
I've made quite a few successful installations before and never had this problem. I also have 20+ years of microsoldering experience, so I can make clean installations and clean soldering points.
I thought the orange screen was a problem with the Wifi chip, even if I didn't damaged any traces or pads making the installation.
So I desoldered everything and tried to boot the switch. It was kind of weird, now with all the hours I've been in front of this console, I can't rememberif it booted or not. I think not, but it booted into Recovery Mode. Under recovery mode, I made a "Reset preserving saves & accounts" and it did it successfully. Then I entered recovery mode and did a system upgrade. It searched for all the wifi networks, I connected to mine, and it downloaded the firmware with no problems.
I did a couple of bootings / powering offs of the console and everything now looked fine and working properly.
So, discarding the wifi chip, I made a new picofly installation, triple checking every single solder point. So, I prepare the SD with all the updated files. Hekate loads up fine. Atmophere shows both screens, and then the Nintendo Switch & Logo screen appears, and it hangs there. No black screen, no Orange Screen. I stays there.
If I boot System Firmware bypassing Picofly, the same happens. Nintendo logo, then Nintendo Switch & Logo screen, and it stays there.
Under Hekate, I went to Nand Info and everything looks fine, BUT, I clicked on "Benchmark", and it starts benchmarking, but halfway it gives an error and forces me to press any key to exit.
So, is the eMMC the problem? Can it be fixed? I saw a program called EmmcHaccGen that I think it can rebuild and flash a new nand. Should I use that?
Thanks a lot for all the help you can provide me. I'm desperate with this console.
EDIT / UPDATE: I tried another MicroSD brand and now after the Nintendo Switch Logo, instead of hanging there, I get an Atmosphere error with Error Code: 2002-3539.
I looked for that error, and I read that 2002 is a Filesystem error. So maybe I'm right and the eMMC is corrupted? Should I try to flash it with any program?
What happens if you try to boot to OFW via Hekate reboot button?
See attached pic (borrowed from Sthetix's HATS pack page)
If OFW is boots correctly then I would imagine that your eMMC is ok.