As a result I had to start looking for stuff on net..about others having similar issues... As it turned out, a lot of other people were having the same problems.
In the meantime, HP has acknowledged the problem and starting fixing the issue by replacing the motherboard in the laptop with a new one (apparantly at no cost to customer, but I cant guarantee that since I have a 4 year hp care pack).
So, now a days, my notebook is with HP for the motherboard replacement.
Read here more about the famous "noisy fan" problem with 6510b/6710b notebooks from HP.
