Psp won't turn on but charges

Hello. I bought a custom psp 3006 (cell phone battery instead of the original one and transparent body) but the seller told me that the psp wouldn't turn on because it didn't have the flat cable for the buttons including the power button. I bought the missing cables and installed them but the psp still doesn't turn on, it only turns on an orange light when I connect the charger. I thought the problem could be the power button board so I bought a new one but still the psp won't turn on, just an orange light when its connected to ac. When I installed the flats I didn't remove the battery because it was soldered, did a fuse blow or is it another problem?