Go to this site. Tell it the model you have

  wee eddie 19:48 30 Jul 2003

They will tell you what you should/can have and for how much. click here

It is more than likely that the process of removing and reinstalling the RAM has damaged it.

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

OnePlus 6T to be sold on contract in UK from O2, EE and Vodafone

Adobe takes the limits off Typekit, renames to Adobe Fonts

Surface Laptop 2 vs MacBook Pro

Où acheter un Mac ?