Question G boy III questions

[dotif]

Hey I was working on my g boy rev III, and, uhh… might have put in a battery in backwards. Only the negative battery terminal touched the g boy’s positive terminal. Some smoke flew up out of the case (I had it open) but that’s about it. No sparks or anything. I re inserted the battery correctly and nothing happened. However, some of the rvl pms components were busted and completely fried. When running, it is extremely hot to the touch, I burned my fingers inspecting it. Am I done for, or do I just need a new rvl pms?

 

[Stitches]

Photos would be helpful, but yeah I think you might have done the goof there. I don't remember if ye originale PMS had reverse polarity protection, but if you got magic smoke then something is definitely fucked.

 

[StonedEdge]

Instant reverse polarity of the battery (no matter how short, even a few ms will do it) will blow up the BQ charging chip and render the board useless. You can buy a replacement here https://www.ti.com/product/BQ25895M

 

[dotif]

Ok thanks! Do I just need a new rvl pms board or is everything else boned?

 

[dotif]

 

[Stitches]

If it was just the BQ chip that went, you can remove and replace it using a hot air station and the rest of the PMS should still be fine.

 

[dotif]

Cool! Thanks for the help!

 

[dotif]

Wait is my battery also ruined?

 

[Stitches]

Nah, your cells will be fine

 

[dotif]

Awesome! Thanks for the help!