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Macs have an "Apple hardware test" you can boot into. And you could as well just boot from an external drive to run all kinds of diagnostics. Phones however...
by grishka 5y ago
Macs have an "Apple hardware test" you can boot into. And you could as well just boot from an external drive to run all kinds of diagnostics.
Phones however...
- toast0 5y agoAndroids usually have some magic buttons to get into a bootloader prompt; you could have a diagnostic in there, perhaps.
- grishka 5y agoYou can boot into fastboot (a barebones flashing and unlocking mode implemented by the bootloader itself) and recovery (a real kernel + minimal UI on top to apply updates and wipe). From fastboot mode, you can boot into an arbitrary image, but that obviously requires an unlocked bootloader. Unlocking the bootloader almost always performs a wipe "to protect data". In principle, it should be possible to have a diagnostic mode the same way recovery is implemented. But there are no device I know of that have this.
- pilsetnieks 5y agoThere is a diagnostic tool for iPhones/iPads, too. It's just not accessible to the general public. https://www.ifixit.com/News/33593/heres-the-secret-repair-tool-apple-wont-let-you-have https://www.ifixit.com/News/33593/heres-the-secret-repair-to...