Bought a switch off ebay to try and repair as a replacement for the one my son broke a while back. When I connect the voltage/amp tester I get zero reading on the amps. I have tried two different battery’s and the same result.
I have checked continuiety between the coil fuse and all capacitors and I can’t find any faults. The only issue I can think is the USB port is broke but looks good on inspection. It does however look like its been changed before so maybe not all pads are making connections I don’t know.
Would just like some pointers on where to troubleshoot this. And thanks for the awesome forum learnt so much on here.
Okey then next step should be to check around components around the battery management chip “BQ241923” it would also be good if you check voltage around that chip with charger connected, maybe no voltage manage to pass from the charger it self because of a faulty charging port (as you mentioned it has been replaced before).
i know at least one should bypass 5V… i think that our problem could be in that area… maybe the chip it self. I will try to get you some readings to compare with.
im not sure about the volt readings around the MT92T36, but i have seen Volt passes around the battery management chip before. on the other side of the board there is another chip called PI3USB, just to make sure please take some readings around the chip as well.
Looks like it is the MT92T36 I get 5.3v from the fuse then I traced that to the bottom left pin on the MT92T36 and I also get 5.3v. I then checked every other pin and there’s no voltage leaving that IC. I will get one ordered