2. Check if there are MP3 files in
external media
3. Check the battery charge
degree
No reading
files from
external media
1. Check the USB flash drive file
system format
2. Check the external media for
availability of viruses
3. Check the number of sublevels
of the folders and MP3 files
stored in the external media
Poor radio
signal
reception
1. Adjust the position of the
extendable antenna, by which
the signal will be received
optimally
2. Best radio signal reception is
insured near the window
3. Make sure that the portable
audio system is removed from
possible interference sources,
such as TV set or mobile phone
19
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