Attackers sometimes use gibberish filenames to:
| Problem | Possible Cause | Solution | | :--- | :--- | :--- | | Error -20 | A standard checkra1n error often caused by a USB connection issue or the device exiting DFU mode prematurely. | Retry the jailbreak process. From the Options menu, ensure is checked before starting. If it fails again, attempt with a different USB cable or a different USB port on your computer. | | Stuck on "Right before trigger (this is the real bug)" | This is a common checkra1n message indicating the exploit failed to trigger. | Reboot both the computer and the iOS device. Put the device into DFU mode manually and restart the checkra1n process. Try a different USB port, preferably a USB 2.0 port. | | Computer will not boot from USB, or gets a black screen | Incorrect BIOS settings, incompatible EFI drivers, or a corrupted flash. | Re-enter BIOS and verify the boot order. Disable Secure Boot and enable Legacy Boot if available. If you have access to another computer, try flashing the USB drive again. For persistent black screens, research your specific motherboard model to find a compatible EFI configuration. | | Device not recognized after booting into Ra1nUSB | The USB cable may be faulty, or the USB port may not be supplying enough power. | Try a different, known-good, Apple-certified Lightning cable. Connect the device to a USB port on the back of your computer (directly on the motherboard) rather than a front panel or hub port. | | Cydia is missing after jailbreak | The checkra1n Loader did not fully complete the installation. | Reboot the iOS device. Open the checkra1n Loader app again. You should have the option to Install Cydia or Reinstall Cydia . Tap it and wait for the process to finish. |
Select the option prefixed with .
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Right-click your USB flash drive inside the application interface. Select first to clean the partitions. ra1nusbintelnewrw4gdmg top
Because Ra1nUSB fools your PC into running a Mac environment, it will fail to boot or trigger a black screen if your motherboard's BIOS is not correctly configured. Restart your PC and spam F2 , F12 , or Del to access your system BIOS, then modify the following settings: : Switch from IDE or RAID to AHCI . Intel Virtualization Technology (VT-x) : Set to Enabled .
This is usually a graphical injection failure. Ensure you are running on dedicated (like Intel HD/UHD graphics) rather than high-end discrete NVIDIA cards, which require specific external kext files to render the environment correctly. 2. "Error -71" or Device Fails to Boot Payload Attackers sometimes use gibberish filenames to: | Problem
To help guide you to the right solution, could you share a few details? What are you trying to jailbreak? What iOS version is it currently running? Are you using a Windows PC or a Mac ?
To safely configure your bootable flash drive, prepare a USB 3.0 drive with a minimum capacity of 16GB. If it fails again, attempt with a different
While 3.0 is faster, many Intel systems prefer a USB 2.0 port for initial boot stability.