|There's probably something else wrong.|
"Packard bell EN TJ65"
"I've tried the battery in another laptop (Acer) and it was detected and charged fine."
Are you SURE you bought the RIGHT battery ?
A battery for a Packard bell EN TJ65 won't necessarly work in an Acer laptop and visa versa ! You may have bought a Acer compatible battery that is NOT compatible with your Packard bell EN TJ65 !
Did you have this problem BEFORE you replaced the battery ?
Have you dropped this laptop, or have you spllled liquid on it , since any battery was last detected properly?
Laptop no video (or video problems), and battery, AC adapter, power jack T shooting.
See response 1:
Tips about battery charging problems on Dell laptops - may apply to other makes.
See response 3 in this by iTech: