A computer hinge includes a hollow cylindrical sleeve which is to receive therein the first extension and the second extension of the first stem and the second stem respectively. The sleeve has an arcuate block integrally formed on one end face of the sleeve to optionally engage with opposite ends of the first connection portion. Furthermore, a limit formed on the second stem to selectively connect to the stop on the sleeve is able to provide a separation force to separate the screen from the main frame.