Tuesday, July 12, 2016

How to make a PC detect a (DEAD) MTK device after flashing with wrong ROM/Firmware (Test Point Method)

Below are instructions on How to make a PC detect a DEAD MTK device after flashing with a wrong ROM/Firmware. It is always advisable to backup a device Stock ROM/Firmware that you are about to flash, and it is always wise not to flash the preloader.bin file found inside a ROM folder except you are really sure that the preloader.bin is exactly the one for that device. Since we are humans we are bound to always make mistakes.
If you made a mistake and flash a ROM with a preloader.bin file which is not the one of the device, the preloader partition gets corrupted thus making the device not being detected by the PC, boot or even charge ie Dead Boot. Since it cannot be detected, there is no way you can reflash the phone with the backed-up ROM or even when the original ROM of the device is now available. This post will show you how you can get your PC to be able to recognize and detect the device again if its in such situation. This process to repair dead boots of mtk devices is known as Test Point.


Romshillzz is not responsible for what ever may happen to your device after using this procedure Do this at your own risk!

How to make a PC detect a DEAD MTK device after flashing with a wrong ROM/Firmware

Step 1: Firstly, you will have to loose the screws of the phone (unscrew device) and take out the board. Then on the board, you will find golden or silver points with various labels like Tx, Rx, Vcc, KCOLO, COLO, KOLO, GND etc Step 2: Now locate a golden or silver point with lable KCOLO or KOLO or COLO on the board. Sometimes these points are found at the volume terminal.
Step 3: Solder a wire on that point (KCOLO, KOLO or COLO) Step 4: Locate the golden or silver point with GND or normal ground on the board.Join the wire form KCOLO or COLO or KOLO to GND on the board. After joining this 2 points, try flashing the device with it's exact (good working & matching) Stock ROM/Firmware, connect the device to the PC using USB Cord and see if it detects. If it doesn't, look for another golden or silver point with same label till your device gets detected by PC. Step 5: When your device is detected by PC, it shows as MTK USB COM inside device manager. Step 6: Now you will have to quickly flash the original preloader.bin file or complete ROM. Step 7: After a successful flash process your device, you can now cut off the wire which you connected. Couple back the phone & Reboot.  
Test Point

Important Notes:

[*] Never use the Tx, Rx, Vcc or any other point that carry some amount of voltage. [*] Phones with no (KCOLO,KOLO or COLO) on its board are mostly spd devices which rarely dies (DEAD MODE). [*] This method is 100% tested by me (RomShillzz).


  1. Can you provide video of this process?

    1. For now, no video clip available for this process. Carefully follow the screenshot or read the tutorials above

  2. When I connect KCOLO test pin with GND then connect usb cable windows sense it but does not recognize it and keep connect and disconnect continuously
    Samsung S7582 mt6572

    1. Reinstall Drivers (Download & Install Miracle Drivers from here) Restart PC after installations keep the wires jioned, Hold together the device Volume Up & Volume Down key, Start Flash and Connect USB Cord

    2. Still Windows does not recognize it (Unknown device ) and keeps connected for 2 sec. then disconnecting and again connecting and disconnecting continuously

    3. i have tried this procedure and it worked for me sir Nice work Shillzz! i had difficulties like zeroone zeroone said___i connected the two point and i flashed without battery

  3. bjr svp cmt faire pour changer le firmware de HUAWEI G700-U10??
    j veu kitter de la 4.2 pour la 5. ou plus!
    m6 pr la compréhension

    1. Merci pour ton commentaire, mais je ne comprends pas vraiment.

    2. comment faire pour changer la rom de mon HUAWEI G700-U10, j'aimerais quitter de la version 4.2.1 pour la version 5.1 ou plus. merci

  4. my tecno l8plus is being detected by pc but stops at boot download with miracle 2.27 pls what should i do


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