the main board in your ipod touch is defective.
if your ipod touch still under 1 year warranty, then give apple support a called ((NNN) NNN-NNNN)
they will get you a replacement
but if your ipod touch over 1 year period, then there is nothing you can do.
if the battery is bad then you can get it replace
but if your ipod main board is defective then there no other way to fix it.
please click accept and have a happy and safe new year