Raspberry Pi 2 can not work

[jixin]

My Raspberry Pi 2 can not start. When I plug in power, there is some message scrolling on screen as normal in the beginning, then there is one line warning 'no sufficient free space', while the message scroll so fast that I can not see clearly the whole message. After that, the screen just turn black and there is no display on HDMI screen. Because I can not log in the system right now, I can not delete data to free some space. My SD card is 16 GB, it should not run out of space in my opinion.

Can anyone know what's the problem? And how to solve this problem.

Thanks

[drgeoff]

No-one can know how to solve the problem because you have not given enough information. What is on the (micro-)SD card and how did it get there?

We might guess that you loaded Raspbian but did not do the step of expanding the file system to use the whole card. But there are many other possibilities.

[jixin]

No-one can know how to solve the problem because you have not given enough information. What is on the (micro-)SD card and how did it get there?

I installed Raspbian with NOOBS installer, and have OpenCV installed, too.
I have two separate scripts to realize two functions: one is video recording and save video in SD card; another one is face recognition. I control either of the script successfully, but when I want to run both of the scripts at the same time, there is conflict and can not enable Picamera component. Therefore only video recording works.
Last time I ran the program on my Raspberry Pi and had the above Picamera conflict problems, then I turn off and unplug my raspberry Pi. Yesterday, when I plug in power and find that there is no display on screen after some scrolling message showed.

[jixin]

No-one can know how to solve the problem because you have not given enough information. What is on the (micro-)SD card and how did it get there?

We might guess that you loaded Raspbian but did not do the step of expanding the file system to use the whole card. But there are many other possibilities.

I tried to use command raspi-config to expand the file system when I first install Raspbian, because I have NOOBS installer, it says it automatically expanded.

[drgeoff]

The next guess (somewhat better informed) is that the card is filled with saved video. If you can run:

Code: Select all

df -h

what does it return?

[jixin]

The next guess (somewhat better informed) is that the card is filled with saved video. If you can run:

Code: Select all

df -h

what does it return?

Thanks for your information.
This problem is solved by connecting the SD card on Linux system computer and deleting some of the recorded videos.