Greetings Posted December 7, 2014 Report Share Posted December 7, 2014 I fried a GoPro Black a week ago after some salt water got inside. It's completely shot but after taking a look at the printed circuit board, I started wondering whether the black patches are supposed to be on the board or are a result of the short circuit. If that's what caused it, what is the black stuff around the chips and transistors? Is it molten/burnt plastic or some sort of transistor material? I find it surprising that the temperature would be so high as to actually burn the board. Quote Link to comment Share on other sites More sharing options...
HippY Posted December 7, 2014 Report Share Posted December 7, 2014 (edited) top right corner? it seems like burnt glue shorts circuits can be bitches and they can create high temps temporary Transistor material= silicone and plastic insulating body btw it has a sexy board ohh thooooose black patches thats around loads of components on the middle too! seems like glue, for heat transferring and/or EMI Edited December 7, 2014 by HippY Quote Link to comment Share on other sites More sharing options...
AndrewEH1 Posted December 7, 2014 Report Share Posted December 7, 2014 Hard to see but it from the photo but the black material between the components could be a thermally conductive encapsulating potting compound. It's been applied quite badly to the board if that is what it is. 1 Quote Link to comment Share on other sites More sharing options...
GavLawson Posted December 8, 2014 Report Share Posted December 8, 2014 The black stuff is a potting compound used for heat dissipation as well as strength and anti vibration. From memory the top right corner of the board in the picture is closest to the terminals of the battery so it wouldn't surprise me if the heat generated when the battery shorted has damaged the transistors/melted the compound. Quote Link to comment Share on other sites More sharing options...
Greetings Posted December 8, 2014 Author Report Share Posted December 8, 2014 Thanks guys, mystery solved From memory the top right corner of the board in the picture is closest to the terminals of the battery so it wouldn't surprise me if the heat generated when the battery shorted has damaged the transistors/melted the compound. Yeah if anything, that's the area of the board which looks cooked. The potting compound there is porous and uneven. Quote Link to comment Share on other sites More sharing options...
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