Welcome to Geeks to Go
When you tried the
even tried new HD.same result
was that an image of the old hard drive
Will it boot to Safe Mode - this of course loads a minimal set of drivers and services.
Have you checked in BIOS setup if all appears OK there
Using the external dvd drive - have you entered recovery console and run a chkdsk - does it go to chkdsk on boot on occassion in otherwords autochk when the dirty bit has been set
How many sticks of ram - are they easily accessible from the base of the notebook, I do not know that model, but you can of course check in the user manual or on the web