I had a really similar problem with my Galaxy S4 Mini [GT-I9192] and was looking at this thread for help. I have cyanogenmod and after factory reset my phone was stuck in a boot loop I could not do anything but launch it in download mode, I accidentaly found a video on youtube with a guy that had the same problem as mine, and in the comments one guy showed this solution:
-> press Power+Home until the device powers off
-> when turned off press Power+Home+Volume down until device powers on
-> keep holding Home+Volume Down until the download mode warning appears
-> cancel with Volume Down to reboot into Android
It worked for me so i figured out I should post here
