My Pad doesnt pickup any camera feedback

[Captainf]

Hi All. I havnt flown my Phantom 2 for over a year. I decided to do so and after recharging everything and getting things going. I was unable to get any photos or video feedback just a black screen.
Please can anyone assist

 

[Dave Hacker]

SD Card in camera?
WiFi off?
Batteries truly taking the charge?
Remove battery
Check by pressing button on/off button for 5 seconds until it flashes
Then see how many bars light up.
4 lights 100%
1 light 25%
Also,Don’t forget the diagnostics available while in the drone.
Hopes this helps