Watch part 2 to check the voltage regulators and part 3 to test the gate voltages. And already start searching for a control board whose cables match yours.

Mount the hoverboard with left as right.. I guess it is a mechanical thing of the speed levers. I don't like fun sports.

Watch my other repair tutorial on the three voltage regulators. The 5V regulator might be strong enough to also power a second MCU. Otherwise you have to add another regulator to the 15V output of the primary regulator or add a cheap 60V 1.5A step down to the battery Input.

I still wait for replacement mosfet from china. Maybe new mosfet will not help because the gate drivers are broken. Then maybe the mosfet burned because the gate voltage jumped to 42 Volt :-( Don't know how to test the gate voltage. Maybe spin the motor and wait until the hall sensor for that mosfet gets activated.. I guess the normal gate voltage should be 10-15 Volt.

No, i only work with hoverboards.

I don't understand what you are saying.

It is annoying when people ask for help without having watched my video. For a shortcut it needs at least two mosfet to burn. And of course you have to unsolder them to get rid of the battery short cut. As you have not cared to provide me with full information, please to not expect me to help you. bye.

@@robodurden I did watch, only one is shorted and still have a problem with it removed, hence why I asked. I am assuming with no power applied to board, the battery plug should not be shorted (with no power), do you know?

@@richierich.1982 well then watch my repair video about the thre voltage regulators. Maybe one of those is shorted. You might also check if the 3.3V pin on the program header is shorted to ground. if not you should be able to power the stm32 with a 3.3V source and read logging data via serial.. But if the fault is not a shorted mosfet bridge then you would have to do smd soldering anyway. Maybe if the TIP127 from the first voltage regulator is broken you might replace this one. And strudy github.com/EFeru/hoverboard-firmware-hack-FOC/blob/main/docs/20150722_hoverboard_sch.pdf to find more possibilities for short cuts.

@@robodurden many thanks, re tested board when got home and 2 more mosfets and the x2 TIP127 transisters were 0 ohms continuity C - E. with all removed, the short has gone, not OL, 200KOhm approx, so ordered parts and will see ... 3.3v to GND is approx 1KOhm. Appreciate you taking the time to reply, I will reply with outcome.

@@robodurden hi good morning, I'm still waiting for my 80N80 mosfets to arrive. I replace both TIP127s. The board now powers up immediately however when 40v applied on battery connector, would this be expected with nothing else connected to motherboard or would you still expect it to power on/off shorting the power button pins? Appreciate your help.

Yes that sounds like broken MOSFETs. This video should tell you how to test. I should make a follow up video how to test the function of the 6 MOSFET with a 9 volt block battery..

@@robodurden yes thank you. I still am confused but I will watch again. Looks like I will also have to learn how to solder and desolder on a pcb.

@@huge_balls you only need to unsolder when you have found a broken mosfet.

I don't know

@@robodurden thanks

Ungern..

If the gates would stay charged after MCU shutdown, the half bridge would shortcut the battery. This apparently does not happen so your post seems a bit idiotic. Study the schematics page 2 and understand how R4 and R9 will discharge the gates. But yes if the first tip127 is shorted and the battery is unplugged, the 3.3V might cease before the MCU shutdown and the low side MOSFET might stay on. With unplugged battery and the high side MOSFET being off this should not really be a problem.

@robo durden hi. Yes maybe I'm wrong. i didnt know about the discharge resistors. Thanks for the insight