The picture below is the PCB of a Xiaomi Acton Electric Skateboard Remote Control.
Basically it is a 2.4 GHz transmitter, transmitting the value of a potentiometer (throttle). Normally when the switch is ON the blue LED will blink.
The remote controller suddenly stopped working, the LED wasn't blinking anymore, and I found out the 2 ICs circled RED in the picture below are way too hot, probably broken.
I don't know what those two ICs are. The IC on the right (labeled Q1) seems like a voltage regulator but I'm not sure. There is a printed label on top of the IC ("Al2RD"). The "Al" looks like a logo. The IC on the left (labeled U3) is labelled "X7DP88". I couldn't find those texts in an online search.
The remote control is powered by 2xAAA 1.5 V batteries yielding ~3 V at Vbat.
Could you help me find out what those ICs are? Or at least what their function is (i.e voltage regulator, diode, transistor)?
Update A quick connectivity test with a multimeter, I came to the schematic below :
It seems like Q1 is some kind of regulator. If it is, then to what voltage doed it regulate the 3 V battery? I thought the logic level of most MCU was 3.3 V. Now what if I use a super new 3 V battery? Could I just bypass this regulator, just to verify if it will turned ON?
The U3 seems like an LED controller (to make it blink?). Is it?