My friend owns a HP Pavilion a1509in Desktop PC(View specifications) which he bought 2.5 years ago. Last week, his powersupply got fried and so he bought a new Colorsit 450W SMPS for Rs.500. His computer ran fine using the new power supply for one day. The next day, while doing a Windows XP disk scan, there was a powercut. When the power came back on, he is unable to turn on his PC ever since. He says that his mouse, keyboard, DVD writer has power(the caps lock, num lock light is on, the red light is on under the mouse, the activity led on DVD writer is visible) but whenever he presses the Power button on his cabinet, nothing is displayed on screen(not even the BIOS info). The screen remains blank. I thought that maybe his monitor had died. So I asked him to disconnect the video adapter from the MB and turn the monitor on. And quite surprisingly, the "No Video Signal" message was displayed on screen. I now think that maybe something has happened to the onboard video chip. What do you guys think?