text: my computer is not working.? yesterday..on sundey i have opened my computer to clean dust with air gun.   now if i switch on the computer it is not working. 1.  screen is blank (black) only indicator of moniter is blinking. 2.  there is no light on key board's caps - num & scroll lock. 3.  indicator of of mouse is blinking. 4.  win (pro) is installed. 5.  model of computer - compaq p- iii  pleae help, advise wht is the problem in my computer. first check all the cables are connected properly, then at back side of cpu u will find a red button, please check it is on or off, and then restart ur pc, it will solve ur problem, otherwise consult a professional, or if u r in india>punjab>abohar email me to solve, i will glad to help u  regards vikas