3DS:RTC black screen bug/es

El bug de pantalla negra del reloj en tiempo real (real-time-clock, o RTC) se refiere a un problema donde la consola podría durar un tiempo extendido en una pantalla negra al encender, usualmente justo después de instalar custom firmware. Esto es debido al reinicio del RTC de la consola a la fecha actual. Anteriormente llamado “lumabug” cuando se pensaba que era un problema de Luma3DS antes de que se encontrara la causa verdadera.

Detalles técnicos

El problema se debe a que la 3DS tiene dos relojes, de la siguiente manera:

• Reloj en tiempo real (Real-time-clock, o RTC): El RTC está integrado en el hardware del sistema. Empieza desde 2000-01-01 y empieza a subir después que la consola es encendida por primera vez, después funcionando incluso mientras la 3DS está apagada. Este reloj no se puede cambiar sin CFW (a menos de que se quite la batería, pero eso solo lo reinicia).
• Reloj del Menú HOME: Un valor en el software, establecido en un valor constante comparado al RTC. La mayoría de aplicaciones usan esto para determinar el tiempo, comparándolo al RTC cuando el tiempo ha cambiado.

During our guide's Finalizing Setup, we set the real time clock to the actual time, and set the offset to 0 - this helps homebrew apps that use the time, as they cannot access the HOME Menu clock but would be using extremely old dates if the RTC were not changed. This RTC fix has the side effect of causing the extended black screen on boot.

The database for Play Coins, gamecoin.dat, stores the date of your last earned Play Coin as an RTC date. When you earn a Play Coin for the first time after fixing the RTC, a gap of (usually) ~22 years is created when the 3DS stores the new Play Coin's date. When the system is next powered on after this, it detects the gap and starts listing every single date up to the new Play Coin's date.

This causes the system to need several minutes to boot.

If you leave your 3DS idle for multiple years, then get a Play Coin, this same issue can happen on stock firmware. However, it will take less time to boot, as there are fewer dates to list than the full 22 years caused by an RTC fix.

Is this my issue?

While experiencing this bug, you cannot boot into the HOME menu normally, but you should still be able to access the Rosalina Menu (L + D-PAD DOWN + SELECT) on the black screen, and be able to hold buttons while powering on to boot to GodMode9 (START) and the Luma3DS configuration menu (SELECT).

If your issue has any of the following, it is not RTC bug:

* If the power LED does not stay on when powering on the console, you are most likely missing boot.firm from the SD root. * If you cannot access the Rosalina menu from the black screen, this is not the RTC bug but may be one of these related issues. You can skip Section II of CFW troubleshooting since we know that RTC bug is not the issue. * If you cannot boot into GodMode9 or the Luma configuration menu, you may have missing CFW files or issues with SD integrity. If not, then you likely have a serious issue that will require guided assistance and should ask the Nintendo Homebrew Discord for help.

Fixing the RTC bug

If you have verified that your issue is specifically the RTC bug, the steps for fixing it are as follows:

# Power off the console # Take out any game cartridge, but leave the SD card in #* The cartridge is unrelated to this issue, but could also cause issues with booting if it's not being read correctly # Power on the console # Leave the console open and powered on for 10-15 minutes. Do not touch the console during this time

If the console boots successfully in that time, the bug is now fixed and is unlikely to happen again. If the console still fails to boot to home menu, ask the Nintendo Homebrew Discord for more help. Mention that you have already tried the RTC bug process.