Hi, I know there are a ton of threads about bricked switches so I'm sorry if this has been asked before. I have a switch here that is completely lifeless. Plugging it into the dock causes the light to flash once and then nothing. I think the m92t36 or the p13usb chip is bad.
The battery will charge, the m92t36 and the bq chip get warm when plugged in. When I first got the switch I measured the battery voltage and got 3.4v, after leaving it plugged in for a while the battery now reads 3.7v. But no other signs of life. I get 4.4v on pin 5 of the m92t36, but the cap connected to pin 6 is shorted to ground on both sides, and seems to be the only cap that is shorted around that chip. I found a video of a guy saying something about a cap near the m92t36 being shorted when the p13usb is bad, but I can't find it now. I checked the components near the p13usb and found that the bigger cap in the center of the attached photo is also shorted, and so are the 4 small caps(or whatever they are) on the other side of the chip.
Seems to me that the p13usb is more likely to be bad. But I'm not sure, so I just wanted to check here. Will replacing the chip remove the shorts? Or will I need to replace the caps too? Could the m92t36 cause this? Thanks.
The battery will charge, the m92t36 and the bq chip get warm when plugged in. When I first got the switch I measured the battery voltage and got 3.4v, after leaving it plugged in for a while the battery now reads 3.7v. But no other signs of life. I get 4.4v on pin 5 of the m92t36, but the cap connected to pin 6 is shorted to ground on both sides, and seems to be the only cap that is shorted around that chip. I found a video of a guy saying something about a cap near the m92t36 being shorted when the p13usb is bad, but I can't find it now. I checked the components near the p13usb and found that the bigger cap in the center of the attached photo is also shorted, and so are the 4 small caps(or whatever they are) on the other side of the chip.
Seems to me that the p13usb is more likely to be bad. But I'm not sure, so I just wanted to check here. Will replacing the chip remove the shorts? Or will I need to replace the caps too? Could the m92t36 cause this? Thanks.