Hi! Long time lurker but first time poster. I have a GZ Yeti 1250 that I wanted to do the LifePo4 upgrade to. I thought the battery was dead as it would not power up. After pulling it apart it seems that the circuit board has been fried. Has anyone had any luck replacing one of these? I called GZ but they no longer manufacture parts and basically said the whole unit is trash. I'd like to be able to replace/repair the board and do the lithium upgrade if possible. I have reached out to a couple electronics shops in town (San Diego) but no luck. Any advice?