Was busy with camera settings

Changed from NTSC to PAL
And since then, there is no image on the phone screen

Am due to get some fotage for a charity organisation  in a few hours time

Have refreshed the firmware
Did  ot help

Help please urgently

Try checking your phone usb jack for debris/lint/fluff? Swap out the cable? Restart your phone? Good luck!

Just curious, if it was working in NTSC why don't you just put it back?

Thanx for the replies
Did put it back to NTSC
It just displays briefly the image and then gone again
Have reset  everything even camera settings and nothing
Have updated app
Have downgraded firmware  and still the same

Left everything off while the remote charges and now the image is back, in the PAL setting
This is very frustrating