Switch not charging & not power on

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alecron

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Hello, first post here and first time fixing a Switch. I recently got a Switch that won't turn on and doesn't seem to charge. I looked for short circuits and I found a lot around both of the MAX77621 so I removed them from the board, but the shorts are still there. I kept looking for more shorts and there were a lot. I rounded all the faulty capacitors i found so far. Do you know what could be happening?

Thanks! (and sorry for my English )

I painted in blue the ones that I don't have a clue about what's happening and green for the MAX77621 ones.

IMG_6542.JPG
IMG_6543.JPG
 
both max77621 ICs are DC buck to SOC, so low resistance(or you thought was short) is normal. but the cap on pin1 BQ shouldn't have short. I would check there first
For reference: my resistance measurement on working v1 motherboard of both max77621 ic cap/coil
LEFT max77621: around 42 ohm
bottom max77621 around 98 ohm
 
Last edited by jkyoho,

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