"  Who know where I can buy  3 zener diodes 1N5233BDITR  for my APM2?  "

"Follow-up. Got the board back last week, but am having a new power issue.  The APM2 works perfectly when powered by USB, However when I connect the plane battery the GPS led on the APM2 board goes out.  The external GPS led  remains…"

"@Chris Kreuzer : you mean it doesnt work with Mavlink 1.0 and AP 2.6 right?"

"@airmamaf: Thank you for replying. Can you explain more about the Percent_RSSI part? Mine is a Rangelink. RSSI out is 3.3v max. Cheers. Minh"

"Hi guys, Noob question: Is the following procedure correct? 1. Update charset with the original Arducam and FW 2.Update ur FW 3.Add your above code to APM_Config.h, line 21 4.Add your above code to GCS_Mavlink.pde, line 412 5.Compile with022 relax…"

"Thanks TJ, I decided to keep it simple and send the board back. "

"John, I'm not an electronics expert by far, so please don't hold me to my suggestions here. I do a bit of hobby electronics. I make my own simple circuit boards and projects. As you suggested, you could still use your ESC power output to…"

"3DR wrote me "...f you would like, you can send the APM2 back to the store for repairs or a replacement and we will check it here. You can also power the APM2 from the inputs, and you will need a separate power source to power the outputs…"

"All I know is they offered to repair if possible or replace the APM2. I'm no electronics expert, but I wonder if the diode is absolutely required, if it can be replaced with a higher capacity part, or if this is a run of bad diodes from the…"

"After about 24 flights, it appears I have the same problem with APM2. Powers from the USB, but not the output rail. Any word on how 3DR is dealing with this?"

"I had the same problem. Replacing the diode worked for me."

"Diode is dead"

"Do you know how to operate a digital multimeter? If so, please check the diode next to JP1. "

"Tsahi, Try powering the board from the input rail or there is a 5V/GND between the UART headers. "

"Hi, My APM worked fine for 2 short flights at my yard. On the third flight it just powered off after landing. Now it does not power on from any ESC on connected to the output rail, only from USB. What am i missing here ???"

"I contacted 3DRobotics in regards to this problem. They also said to ship the board back to them for repair or replacement. I have done so. They don't have any idea how long this process might take :( At least they're trying I guess."