Other Parts Discussed in Thread: BQ24725A, BQ40Z40, BQ34Z100, BQ4050,
HI TI Team
During the span of 3 months, I have 3 dead EV2400. My first one died while working plugged and then lost it's communication. This was bought about 2 months before from Digikey. Then I tried to get help from TI forums and was suggested to buy new one. We spent money and went ahead and bought another one. TI shipped us unit which was dead on arrival. After going back and forth , the unit was replaced by sending new EV2400. We recieved that unit sometime early March and confirmed it was working. We are currently evaluating BQ40z40, BQ4050, BQ34z100 and BQ24725A chips. Then the lockdown happened here in India and this week some of the restrictions were lifted and I went back to office to resume the development work. When I plugged the unit back in, 3rd unit, it won't respond. The computer won't detect as new device and neither is front LED on.
Disappointed , I had restarted the computer, changed to different ports and even tried on different machine, but it is same result. I know now I am looking at another dead board. I removed the screw and test the different test points. TP3 has no voltage and there is 4.5v on USB test point. TI team needs to shed on some light here and diagnose. Is it bad MCU or some dead resistors ?? Suggesting to buy new one does not help since I think last one I had is less than 60 days and I hardly used it for week since we were stuck in lockdown.
What is going on here ?? These are expensive units and I can't be burning so much cash just on communication tools again and again. I finished writing the smbus and i2c library readout parts before and I need tool to develop the writing functions to flash.
Since all these dead EV2400 is not being detected, Pls help to repair these ones or replace my unit.
Another Question: Since TI is giving all the board files. If we make our own board, can we use EV2400 updater program to flash the firmware to new board.
