What to do if it freezes with a blank screen

Tried to restart the mac pressing CMD+Opt+On/Off then pressing CMD+R+On/Off with the restart sound going off. However, it still freezes with a blank screen. All control buttons such as brightness and volume do not work at all. After waiting for few seconds, it ask me to press Return key if i wanted to put english as my language which i did and still with a blank screen. A few seconds later, the edges around the keyboard became hot. Then i tried to restart it the same process a few times, still the same results. This happened right after i login into my account.