When I hooked up an external power supply to power sensors on an I2C hub the speaker in the GPS sounds like it blew (all the tones are scratchy) also I don't think Im getting a lock but I have to take it outside to be sure. Any solutions?
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The RDDRONE-FMUK66 schematics, gerbers etc are here: https://www.nxp.com/design/designs/px4-robotic-drone-fmu-rddrone-fmuk66:RDDRONE-FMUK66?&tid=vanRDDRO.... Generally you should not back power the FMU with 5V externally. the signal lines are all 3V, so it could be possible to damage something. But there's nothing obvious as to why the GPS beeper would suffer.
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