It doesn't mean your phone is broken. It means your phone is waiting for a command. It is sitting at the loading screen of life, waiting for you to hit "Continue."
Just remember: You have about 3 seconds to catch it before it times out and tries to boot normally. Miss that window? Unplug and try again. Have you used SP Flash Tool to revive a dead MTK device? Let me know in the comments—did the VCOM port show up on COM3 or COM11?
If you’ve ever tried to revive a dead Android phone, mod a smartwatch, or flash custom firmware, you’ve probably seen a strange device pop up in your Windows Device Manager: MediaTek Preloader USB VCOM .