P3P went broke after firmware update

[keiga591]

Hello, I have the problem after not using for a while (6,7 months), my P3P can't live image on DJI GO app, can't read SD card

I usually maintain my P3P every year, take her out and give her a few ride but this year when I turn on my P3P DJI GO app on my Iphone, it shows blackscreen with dji logo, gimbal disconnected, compass error (I live in a metal box), when I try to fly with attitude mode, It takes off normally but still no image. The most curious part is It does not state "No image transmission".
I tried to replace cable, downgrade RC to 1.9.2 then 1.8.0 but no luck, tried to reinstall AC firmware ver 11.20.00 but after I plug the SD card in, AC does not do anything but continue to flash error-ly
Removing the SD card doesn't work, the AC have two flashing state: red and yellow in succession; green, red, yellow but faster in this state.
Method tried:
- Replace cable
- Downgrade RC
- Fully charge batterty RC,AC
- Switch to Android
- No image take off (Attitude flight mode)

Please help me I need to finish this year maintenance

Firmware
App: 3.1.68
AC: 11.20.00
RC: 1.9.3

 

[Sky Wombat]

Gee keiga591 sounds like a problem that some of the four big guns will help you with. In the meantime, when I had a no picture issue it was resolved by turning drone off, removing the sd card, turning the P3P on. If an image is transmitted turn off, insert card, power up and good to go. It is a long shot but simple...if it works.