i believe those blinking lights mean there is a carriage error... you can press the paper feed button to clear the error... in other words something is jamming the carriage... to take the top off you need to do these steps
first unscrew the two obvious screws that are in the front on the top...
second unscrew the two screw hiding by the paper feeder guide... they are under the hinges...
third is the hard part... there are five tabs holding the top on you can see two the the right of the printer through were the ink cartridges sit... and you can see one to the left... there is one each hidden on each side in the back that you kind of just have to rock the top and risk breaking them or you can slip a skinny flat head through the opening that you have created by unhooking the front three tabs and getting the other two... they are on the same side of the printer as the three...
once you have the top off then you can figure out what is causing the clicks...
something is blocking the carriage
by no means am i responsible for your failure in taking apart the printer....