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Fixing a hoverboard that won’t turn on or charge and beeps when the power button is pushed

How to fix a hoverboard that won’t turn on or charge and beeps when the power button is pushed then turns off. I will show you how to diagnose battery trouble due to a depleted battery, ways of fixing a hoverboard battery too low to charge and other BMS battery trouble I found. My battery tested fine but still didn’t work–  don’t let the battery fool you due to BMS trouble. Then after I got the hoverboard running, the board was way off balance and ran crazy. So, I’ll show you how to adjust and calibrate the gyro.

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Things you need

Things you are going to need are a screwdriver, razor knife, voltage meter, tape, and of course a hoverboard.

The common problems with a hoverboard

One common trouble I found, especially if you don’t use the hoverboard for a long time before you get it out and turn it on, is when you push the power button it beeps and won’t turn on or charge. One reason for this is a depleted battery. The BMS on the battery detects too much amperage being pulled when it tries to charge and it shuts the power off to the battery. There are a couple of things you can try to fix this.

remove the battery out of the hoverboard

The first thing is to remove the battery out of the hoverboard: flip your hoverboard over, and on the opposite side of the power button should be the side you’re going to work on.  With a Phillips screwdriver remove all the screws and then remove the cover. You’ll have to undo a wire connecting the lights on the hoverboard. Once you unhook your cover, you should see the battery. Take the screws out of the plastic clip holding the battery and gently lift out the battery. Take a voltage meter and put it at the end of the terminal on the battery. Check if you have less than 36 volts– usually quite a bit less close to 33 or 34 volts. If you do, it’s likely that your battery is too depleted to charge on its own. If it’s over 40 volts and still doesn’t work, it may be due to the BMS not working when the battery is fully charged. I’ll get to that latter

Depleted Hoverboard Battery

over depleted battery

To fix an over depleted battery, get yourself a razor knife and carefully cut the surrounding cover off the battery to expose the BMS on the battery. Once you have located the BMS, you need to find the main negative terminal on the battery. The main positive will be the red wire, and your main negative wire will be directly on the battery–this will take a little trial and error to find. The voltage reading will be close to the reading that you got straight from the terminals. It should be a couple of volts higher. Once you find the wire with this high voltage reading, you’ll know which one is your negative terminal.

 light on the power supply goes from green to red

After you have located your main and negative terminal, you can hook the battery up directly to a lab bench power supply to charge the battery to 36 volts so the BMS can work. Hook your positive red wire up then hook the negative directly to the negative terminal on the battery itself–this will bypass the BMS on the battery so it will take charge. Once the battery is close to 36 volts, the BMS– if it’s working correctly–should be able to finish charging the battery. Hook it up to your hoverboard as you would normally. Plug it in and see if the light on the power supply goes from green to red. Red means it’s charging.

bypass the BMS directly on the battery

Or you can bypass the BMS directly on the battery.  With your battery plugged into your hoverboard, you take a jumper and carefully take the negative wire and put it directly to the negative spot on the battery. Doing this will bypass the BMS and allow it to charge. You should see the light on the charger go to red. It might take a couple of times but a few seconds should give it enough power to start charging –continue to check it with your voltage meter once you’re close to 36 volts. If it doesn’t charge by itself without being jumped across, you are going to need to repair your BMS, replace it, or change the battery.

Other Hoverboard Battery Trouble

Hoverboard Battery

On my kid’s hoverboards, I bypassed the for BMS to make it charge. This worked great for a couple of weeks then I noticed one day after charging that it was acting as it did before. When I pushed the power button on it would turn on and then off instantly. When I pulled the battery out and checked the voltage, I realized it was over 40 volts, and the BMS was cutting the voltage the second there was a draw on the battery. So don’t let it fool you, the battery can seem fine with your voltage meter, but the BMS could still be causing trouble. Now if I draw the battery down, it will work fine until I recharge it again. So to keep my kids happy, I just ordered a new hoverboard battery and installed it which was quicker.

This might be another video opportunity I can do later seeing if can fix the BMS on the battery or replace it. I’m thinking of using this battery for a completely different project. I would appreciate some ideas on what you would like me to do with this battery.

How to calibrate the gyro on a hoverboard

With attempting to fix the hoverboard and trying to calibrate the battery I must have messed up the gyro calibration. The hoverboard was acting weird and was unrideable because of acting sporadically.  I realize that if I held it tilted it was fine. What was wrong was the gyro had uncalibrated. All I had to do is calibrate the gyro on the hoverboard.

How to calibrate the gyro on a hoverboard. Set hoverboard completely level and flat. With the hoverboard off, press and hold the power button in for 5 seconds. On my hoverboard, all the lights started flashing, and it started making noise. Once it does that, let go of the power button and then press the button one more time. Now the Gyro is recalibrated.

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