IMPORTANT: Make a backup before trying any of the following steps!
Usually the animation video is stored at:
/system/media/video/shutdown You can rename this to something else. Or delete all the files from there.
If it's not there, check
/data/local/ May be it can be found there.
In some cases shutdown animation may be handled by an APK. Check under
system/app if you have a
PowerOff.apk. If yes (like in LG-P692), you also have
PowerOff.odex there. Do NOT touch
In this case you can modify the
PowerOff.apk. This is how:
PowerOff.apkto your PC
Use 7zip or WinRAR or any uncompressor software you have, to open the APK. Go to
res/drawable folders. You might have up to 3-4 of them like:
drawable-xdpi (in case of LG-P692, only
drawable-mdpi will be found).
There you can see some
.jpg files. Replace those with any images that you want. If you don't want anything there you can use plain black images. Make sure that you put the images with the same resolution that of the original images. Replace images in all the drawable folders.
After you replace those images, make sure the APK is in the same format as it was earlier, except the images that have been changed.
Now copy back the
PowerOff.apk to your phone where it was.
Power off your phone. REMOVE your battery. Power on. And now test.
See how this helps.
Tested with an LG-P692.