Hello everybody,
first of all what a great forum! Thanks a lot for this !
About my problem.
Got a Nintendo Switch here that couldn’t be turned on. With the measuring device I got a result of 0.61Amps, after a short time 0.9Amps which is clearly too much. The battery itself charges and has a voltage of 3.7V - 3.9V. But the screen stays black.
After opening the switch and looking for short circuits, I came to this chip that is clearly burned (see picture). I hope someone of you can tell me what kind of chip it is, what it is responsible for and where I can possibly get a replacement.
It’s a BGA chip and you must get it from a donor logic board. I personally did not find it anywhere.
I think he uses 0.3mm balls.
Can you watch and tell me what he writes on his face?
Ty for ur Reply 
allready desolder it , also i got a doner bord…buuut i lost this little piece of s… tiny thingi 
.
I wonder if it there is any difference between EU boards and US boards.
Mine has the label EN56
But in the other Post it has the Label ENIJ 
After desoldering it (20Pin)and with the discription of the nearby IC’s on the board I think the BGA has something to do with the Audio Codec.
Anyway , yesterday i put everythink together turned the switch Power Button and asap Switch got extrem Hot at the BQ24193 and the Heat Shield and Amps going from 0,5 to 0,9 and 5 seks later zero.
I put my Multimeter out and began to measure the Capacitors in front and backside.
Results
-Caps at BQ = Shorted
-Caps at M92T = OK
-Caps at Video Chip Shoted
-Caps at Main Chip Shorted
-Caps at Audio Codec Short
-After a Short while of thinking i began to desolder
-First Audio Codes = Shorts Stay
-Video IC = Shorts Stay
-BQ = Shorts gone - Bingo !
Too bad that nobody knows the Part of this s… little BGA - have to wait for another broken Switch to look closer at it.
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What do u mean with that ?
EN56 does he have 20 balls ?
Yes,
took a picture
Interesting , just see that the second row is bridged.
TThat must have happened when I soldered the pins
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Clean well the residue of balls and put other new balls. I think he uses 0.3mm balls and then puts it back on the logic board. Good flux AMTECH 223 or 559. Use the hot air station set to 330-350 degrees and the minimum air volume.
I have two boards here, the markings are EN81 and ENA6. Looks like it’s a boost regulator, or a charge pump. I pulled the datasheet of the thing it’s connected to (audio chip) and those pins are used for a charge pump cap.
I did a cursory search for a 20BGA package, and there are a ton. The EN looks to be the chip ID, and the other digits are probably a date code. If you look through datasheets you might be able to find what you need. Good luck.
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finaly after weeks(with brakes ^^) i got it !
Its an DAC + Stereo Headphone Amplifier with Electronic Volume (TC94B15WBG)
now i just searching for an supplier… have found some i wrote an inquiry. dont want 2 buy 2,5k pieces ^^
Ty for ur help !
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