Hey guys, in the second half of year my P3P video downlink started to become severely corrupt after flying for 10 minutes or less. This is what I had posted about this before on another thread:
..... I began experiencing a lot of noise on the live-stream from my P3P. This happened after it warmed up for a few minutes and occurred even when the unit was within a few meters of the TX. Was about to give up and send the unit in for repair when I decided to put the original USB module back on the TX. Cured the problem so it turns out at the HDMI module that I have went bad. Something to try if you're having this issue.
Well, I end up sending the TX w/HDMI module in to DJI for repair since I like sharing the video downlink with others. When it came back it was doing the same thing. So I sent it back again. This time they sent me a different (appears new) TX w/HDMI module which I received last night. After re-binding the TX to my P3P, I tested the HDMI out functionality using my TV, which worked fine. I left it running for about 10 minutes and there were no apparent video issues. At this time I should have probably tested it a few more times but the TX firmware was version 1.6.0 and the app was telling me an update is needed. I updated the TX to 1.8.0 and BAMMO, the severe corruption returned after a few minutes. Luckily I found out how to downgrade the TX firmware and I downgraded it back to 1.5.8, which I tested three times for >10 minutes each time and didn't see any video issues. I now flashed it back to 1.6.0 and am testing that but so far so good.
My new theory is that when the DJI engineers made tweaks to version 1.8.0 TX firmware, they did so only testing it with the stock output module (or they didn't test it long enough on a HDMI equipped TX), and the code does not play nicely with the HDMI module. In other words, this was not an HDMI output module hardware failure like I originally suspected.
For the few of you that have this configuration I setup a poll to try and validate my theory.
PS: If you want to see what this video corruption looks like I have some videos here where I swap between the HDMI and stock output module:
Box | Simple Online Collaboration: Online File Storage, FTP Replacement, Team Workspaces
..... I began experiencing a lot of noise on the live-stream from my P3P. This happened after it warmed up for a few minutes and occurred even when the unit was within a few meters of the TX. Was about to give up and send the unit in for repair when I decided to put the original USB module back on the TX. Cured the problem so it turns out at the HDMI module that I have went bad. Something to try if you're having this issue.
Well, I end up sending the TX w/HDMI module in to DJI for repair since I like sharing the video downlink with others. When it came back it was doing the same thing. So I sent it back again. This time they sent me a different (appears new) TX w/HDMI module which I received last night. After re-binding the TX to my P3P, I tested the HDMI out functionality using my TV, which worked fine. I left it running for about 10 minutes and there were no apparent video issues. At this time I should have probably tested it a few more times but the TX firmware was version 1.6.0 and the app was telling me an update is needed. I updated the TX to 1.8.0 and BAMMO, the severe corruption returned after a few minutes. Luckily I found out how to downgrade the TX firmware and I downgraded it back to 1.5.8, which I tested three times for >10 minutes each time and didn't see any video issues. I now flashed it back to 1.6.0 and am testing that but so far so good.
My new theory is that when the DJI engineers made tweaks to version 1.8.0 TX firmware, they did so only testing it with the stock output module (or they didn't test it long enough on a HDMI equipped TX), and the code does not play nicely with the HDMI module. In other words, this was not an HDMI output module hardware failure like I originally suspected.
For the few of you that have this configuration I setup a poll to try and validate my theory.
PS: If you want to see what this video corruption looks like I have some videos here where I swap between the HDMI and stock output module:
Box | Simple Online Collaboration: Online File Storage, FTP Replacement, Team Workspaces
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