My psp wont turn on. the amber chargeing light is on, even left for a few hours to charge still wont charge and replaced the battery.

Hi there!
When you charge your PSP with the charger (USB/wall) does the power light turn to amber? If it does not, It's possible that your charger (USB/wall) is already broken. You may need to purchase a new one.
If it does, you may have either a loose power switch (which happens on my PSP Go) or you may need to have your unit checked with a qualified technician.
Hope this helps!