Report Lectro R1a Damage on Camera in Cameras... love them, hate them Posted June 3 I'm extrapolating from what little I know, but since witnessing something kinda maybe similar, and since cheap(ish) d-tap/p-tap camera batts are increasingly part of my little world, I've learned a bit that *might* be relevant. Short version: D-Tap/P-Tap cables and ports aren't optimally designed or made...and different brands of connectors and ports don't necessarily connect cleanly...and all this can cause shorts. I have no idea if this is what you're dealing with Brian. Best of luck. If your were powering your R1a units with the same battery used to run the camera, maybe the p-tap cable shorted the R1a units? I'm pretty sure something like that happened on to a C300 a few years ago on a job (not my camera or department, "luckily," but all around bummer). So the camera battery that powered the camera had a d-tap port that was used to power a small monitor....and when plugging in the d-tap cable, the SDI BNC port on the C300 went down. The camera had to go back to Canon for repair. That's the only incident I've witnessed, but I've heard of people having the same problem with d-tap/p-tap connectors powering external monitors leading to fried camera SDI or HDMI ports on a few brands of camera (paraphrase: "This all worked fine for months...and the all of a sudden..."). Arri and Red both warn about stuff like this. And while I haven't heard of issues with RX, maybe... Apparently, when connecting a d-tap/p-tap cable to power, sometimes the d-tap/p-tap positive pin connects before the negative (especially on crappy or damaged connectors), and if the same battery is powering both the camera and an external peripheral connected through a BNC, HDMI, and perhaps audio port, then that port is used to close the circuit and sometimes fry the port (and perhaps peripheral). Not sure that's clear. I'll embed a couple links that explain things succinctly. So when using a single battery power to power both a camera (directly) and a peripheral (monitor, rx, etc) via d-tap/p-tap, first connect the battery to the camera, then connect the d-tap cable to the peripheral. And only then connect the audio (or monitor) cable to the camera and peripheral. When disconnecting, disconnect the audio/monitor cable before unplugging the d-tap cable. Or power your RX/monitor with their own batteries... Here's a three-page PDF from Arri titled "Preventing Damage to SDI outputs" https://www.arri.com/resource/blob/194752/d3093e6af632150787ec95d176a39958/download-technical-information-data.pdf Red has similar info: https://support.red.com/hc/en-us/articles/360057166453-Preventing-Damage-to-SDI-Outputs Here's a one-minute video from Arri explaining the SDI short problem (google doesn't show the video on YouTube, so this might not embed): https://www.arri.com/resource/blob/195968/994529ee419abe1e2ca0dfbf95c4b4e1/marc-shipman-mueller-data.mp4 HTH!