won't turn on PSP 2004

Psp model 2004, and cases:

-when have battery + charging, light orange comes all the time;

-when removing the battery + charging, light green come on 2s and disappear;

-when not charging and turn on, light green come on 2s and disappear;

My screen in these situations is black(won’t turn), I don’t hear any sound or vibrations.

suggestions of what could be (motherboard, battery, software, etc..).

Thanks,

Francisco Caldeira