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I like this thread so i will ask for help here regarding a non charging switch.
Switch powers on and had physically damaged USB-C port. I replaced it (as I have maybe 15 times before) and i am not getting a charge in either direction of the usb c cable. The fuse near the port is good, and im pretty sure i have the port lined up correctly. Any advice? I checked for shorts on some caps and resistors but didnt find anything quickly.
Hi Devon093,
now much amps is it drawing when you plug it? (test it with one of those USB adapters that you can plug in between charger and NSW)
take the main board out of the case, check for corrosion aroudn BQ and M92 chips
check pin 5 and 6 of the M92t36 chip with the battery and plug connected, you should get between 3-6v on each one
check the test pad next to the fuse, you should see full 4.9 or 5v coming in
unplug charger and plug battery only, now check the test pad to the right of the water indicator, should see 3.7v coming in
check caps around BQ chip, they should not be shorted on 1 side (disconnect battery for this) we have other thread where we shared the readings for those caps you may want to compare them but I would say.. as long as you dont see nasty short and none of them have developed "an eye" then you are good..
check that there is no solder between the anchor points of the USB port and the shield to the left.. or the test pads right to the left on the front of the board, I saw a couple of switches that came over with a bad USB repair done and it was sending the main power rail to ground LOL
if all is good but there is no charging at all, check PI3USB, sometimes this been shorted causes weird behaviour in other parts of the board
if all of this is good and you still not getting charge, try a known good battery
next is to start checking for shorts somewhere else, the power cycle seems to be sending current to WIFI chip after passes through the APU so if you see normal voltages there.. it means the APU is good, if you see something strange on that side then get worried.
ultimately, if all fails I would start lifting the main chips 1 by 1 and re-checking for shorts after and testing after each chip, a good re-flow get those balls back in order sometime
Good luck mate let us know how it goes!