I have a friends Switch that I have been trying to fix for a while. (and I thought it was done!)
When I first started looking into it I found the following:
- The large horizonatal cap below the BQ chip was shorted. (the actual cap had failed), so I replaced this.
- The fuse by the charge port was blown, so I replaced that.
- It still didn’t charge (but now booted), so I replaced the BQ and MT chips out . I was new to chip replacing, it took a few goes but eventually it was happily charging.
I have now had it unused for a few months (waiting for an opportunity to give it back), and just went to give it another test, and the BQ chip is showing shorts on the horizontal cap again, as well as the one in the top right.
I guess a new BQ is in order here, but I am worried that there is some other issue that is causing this to happen.
Any ideas what might cause this?