I've got a P3 800 Mhz running a 80G harddisk. I installed a new ATI Geforce 4 MX 440 card and the screen got screwed up during booting and during the whole course of usage.(Everything went fine except with a screw-up screen). I figured it out that the graphics card is at fault, thus I've changed it back to my original card (Nvidia) and the problem starts.
I'm unable to boot up. After waiting about a few hours, I'm able to boot as per normal and run everything as per normal. My HD, CD-Rom, floppy,... everything went perfectly fine... until I shutdown properly (Clicked on Shutdown Button and had been prompted to go ahead and press the power supply button to switch the power off.) and then I proceeded to switch off the main switch.
And at the moment that I want to boot the PC up again (immediately after the abovementioned shutdown), there is no POST beep but the CPU fan,HD,LED light,CD-Rom and even the fan on the nvidia graphics card is moving. I discovered other than the beep is not heard, the monitor registered no signal and went blank (monitor is fine). It seems like a brain-dead patient.
Please help me as this PC is built for my dad's usage.