DeWalt DCD777 dead, driver board fix, TI DRV91680A brushless driver

This is the happy story of a lonely DeWalt drill, found in the city recycling bin. The symptom was no power, no blinking led ( not like in the the case for loose battery thermistor connection, where the drill white LED blinks once). I have seen some video on the net about a dead drill and the cause was those little 2 fuses being blown, I was decided to search for them and check. I used the same paint stripper as in my other videos to remove the white silicon filler used to cover the brush-less driver board. After searching for the 2 fuses, to my disappointment they were just fine. In the beginning I was not motivated to continue the troubleshooting but I decided to dig further. The thorough cleaning of the driver board was taking a bit of time but the paint remover does miracles to soften the glue, then it&easy to brush-it off. It is a custom chip that may have been used only for special customers, like DeWalt. In that datasheet I could see the power for the chip goes also to the Hall sensors on the back of the motor and while measuring voltages on the Hall sensors pcb, I see the voltage was variable, 3-4V. This was weird. Searching more for the "intermittent" symptom I found the voltage regulator area, poking the parts there, right away I saw those 2 loose diodes, due to a cold joint solder. After re-soldering them, I tested the the drill, it came back to life! Voltage on the Hall sensors now measure 8 V. The drill seems to consistently be working now. That is all.