The little mall behind the old Sofitel in Kahraba street, it's a computer and accesories place. I had a problem with my ACER and got the replacement there. take the old one with you.
for directions,
if you are driving from Ramada junction towards Jadah bridge, you need to go over the bridge, pass the next junction (qtel) and you will see it 300 metres away on your right side.