nothing to worry about Pasan
check steps described from akram second post on this thread. this will do the trick. did you ever disassemble the controller. the real time board is the one at the far right of the picture you made under a the fully closed aluminium plate. take a lot of pictures where everything goes so when reassembling you put everything back in place. what you will need is an old power supply and old isa vga card and an old keyboard. and a new battery

best of luck