Unfortunately, I do not have the equipment to dump the firmware. I am looking for some cheap programer/reader to get the dump from the flash. I don not want to invest 200$ for something that I will use only once.
Still looking for cheaper ways to dump flash than the commercial programer
Dont know if you will find a replacement. you can just replace with another switching regulator from aliexpress. Or just search for M5291P on aliexpress if you can find someone selling it.
Pin 1 - V+ Pin 8 - GND Pin 2-7 are general purpose input output and from the picture seems Pin 4 is connected to IR detector. Check if Pin 5 and pin 6 going to Pin 2 of each of the BP2858.
And if it is a microcontroller and you suspect its gone, it will be difficult to fix it unless you get someone to dump the controller flash (and it is not protected) or you have another of these LED lamps.
I see an inductor close to it so I assume thats a switching regulator. I see there are more such sot23-5 on this board. Can you check what is U12, U13 and U14 are? If they have same markings?
I am afraid that you need trace the pins and draw a pinout. What is the input voltage for this device on the power jack? I see one 5v test point, check if it connects to one of the pins on the S1Axx.
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