When a device displays only a black screen and connects as MediaTek USB Port (COMx) or Preloader VCOM , it means the bootloader is corrupted.
"Preloader-k62v1-64-bsp.bin" a critical low-level firmware component used by devices running on MediaTek (MTK) chipsets, specifically the MT6762 (Helio P22) MT6765 (Helio P35) What is this file? : It is the
: Fixing a device that won't turn on or is stuck in a boot loop. Flashing Firmware : Reinstalling the factory software. Bypassing Security
If you attempt to flash Preloader-k62v1-64-bsp.bin onto a device that uses a different motherboard revision, the RAM initialization will fail. Because the preloader is corrupt, the device can no longer open a USB communication port, requiring hardware-level intervention (such as shorting Test Points on the motherboard) to revive. Best Practices for Handling the Binary File Preloader-k62v1-64-bsp.bin
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Your type (Windows 10, Windows 11, or Linux)
What a preloader does
Without a valid, matching preloader, an MTK device will not boot or be recognized by flashing tools.
Working with low-level binaries carries an inherent risk. Utilizing an incompatible preloader can corrupt the boot sequence. Prerequisites & Tools Needed
: A tool that supports "Custom Preloader" selection, such as UnlockTool 2. Operational Steps (Example via UnlockTool) When a device displays only a black screen
: Commonly found in "clones" or budget smartphones (often labeled as in system info) and some official models like the W&O X200 Pro The "k62v1_64_bsp" Tag : This refers to the specific Board Support Package (BSP) for 64-bit hardware architecture using that chipset family. Why you might need it
Check your board’s silkscreen or run cat /proc/cpuinfo (on a working device) to confirm Hardware string contains k62v1 .
High-speed MTK USB VCOM Drivers installed on your host system. Flashing Firmware : Reinstalling the factory software
The Preloader-k62v1-64-bsp.bin file is typically associated with MediaTek chipsets, specifically the (Helio P22) and MT6765 (Helio P35) families. It's a core component of the Android system image for devices built on this hardware.