Trying to upgrade the HDD on a Acer Aspre T135. Capacity 320GB Connected the new drive to the board (spare Sata slot) powered up still with the original drive connected. Firstly ran like a dog with 2 legs,did not recognise the drive,no error messages could still see the original drive etc. Bios check could not find the new drive. Connected the new HDD to the old hdd connectors still not recognised by the Bios, ran a windows install disc,windows could not find the drive. Question; Is this drive compatible with the board? Am I being really stupid and have done or missed something really important? Yes the new HDD appears to be spinning up. I ran Hirens and did a check on the HDD with no success. Took the HDD back to shop and now have a new HDD still got the same problem. Any help would be greatly appreciated.