I have an old computer and the I don't see a picture on the screen.
I have tried remove the power cord and pressing the power button for one minute,Unplug keyboard and mouse,removed CMOS battery,Removed Graphics card and plugged it in an other slot and cleaned it.The Computer isn't beeping and the CPU fan is working and I can hear noise.
What Do you think the problem is?
Thank you for help.
Basically you need to swap parts, which can really be a pain however that's all you can do.
I'd do it in this order:
1) Graphics card
2) Power Supply
It may be something else but start there and get back and I'll help if possible.
*You can also confirm the graphics card by trying it another computer. AGP is roughly 10 years old and was replaced by PCIe (PCI Express). Any PCIe card will work in any PCIe motherboard as long as the Power Supply is adequate.
The same goes for power supply. The PSU need not fit in the case to test it. Modern PSU's have 24pins on the motherboard input and older motherboards use 20pins, however most (or all?) of the modern PSU's can unhook the last 4 pins for compatibility.