jimmycat Posted March 13, 2022 Report Share Posted March 13, 2022 Hi, My old but reliable 788t stopped working with any Li-ion batteries I put in, no more power-drawing, no more power-charging. The circuit seems just dead. The batteries themselves all work fine on other devices. The unit still runs well with external V-mount batteries, but I just feel worried running it without a bridging power source as a protection. Has anyone had the same issue? Quote Link to comment Share on other sites More sharing options...
r.paterson Posted March 13, 2022 Report Share Posted March 13, 2022 I had that issue early on there is a power transitor that blows..it was a fairly easy fix by SD..sounds like the same issue maybe..also there is a relay for the internal batts ..you can hear it click if you listen closeky when you select internal batt charge..the relay may be an issue?.. Quote Link to comment Share on other sites More sharing options...
jimmycat Posted March 14, 2022 Author Report Share Posted March 14, 2022 Thanks for the info. I don't hear any clicks when the batt is supposed to be in the charging mode. Does it mean the relay is broken? Also, if mine also has a blown transistor, do you think it's easy to replace/fix it by myself? Quote Link to comment Share on other sites More sharing options...
r.paterson Posted March 14, 2022 Report Share Posted March 14, 2022 I see you are uk based..No not easy to diy fix..call Kris Jarosv krisaudioservices@gmail.com London based..does UK Sound Devices repairs highly recommended and carries spares for Sound Devices..Kris looked after my 788t along with a lot of other 788t users . Very reasonably priced Quote Link to comment Share on other sites More sharing options...
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