EasyNote LJ65 8gb ram

Good morning guys sorry my English to translate, I have a great demand, and I will thank you so much who will help me, I have a packard bell easy note lj65 that I use for the university, and I do not have the money to buy a more powerful, help me to unlock the bios to be able to install more than 4GB of RAM?, I tried to mount 8GB but the PC does not turn on, with a single 4GB banquet, help please

http://global-download.packardbell.com/G...C=EMEA_27P