Hi, I'm new to this forum, it's a great site!!! Helped me alot already, I was just wondering if anyone experience this problem before:

After modifying the backuped up firmware of your MP4 player, changing only pictures then uploading it back to your MP4 player, makes it so that during mp3 music playback, the backlight won't shut off, thus draining battery power really quickly.

what I have tried:
-changing sleep time
-reloading original firmware
None helped, but before I modified the firmware, the light would shut off after about 5 seconds during mp3 playback

steup:
Firmware 3.5.37
1 GB 1.5" nano clone

thanks for any tips!