Old Pentium 2 Monitor Black (Video Card Problem)?

I work as a part-time computer technician assistant for allinonecomputer and I had a customer bring her computer to my house, and due to me being limited in parts, I tested her Power Supply on my brother's motherboard, turns out the power supply was bad because it fried two motherboards.



So I had to replace his HP intel motherboard with his celeron 2.7ghz processor with a pentium 2 266mhz processor. Problem is... the damn thing boots up, but the monitor remains black. It has one agp slot and about five pci slots, and one ISA slot.



I have four 4-16mb video cards I tried using in every single slot, repeatedly booting it up and shutting it down and switching. But every slot and card I try... nothing works.



I tried booting a linux live CD, but for some reason (that I can't see) it's not booting at all. I also tried a windows CD, but I couldn't see what was going on.





Any suggestions?





(I've gotten most of my computer experience from modifying programs and frankensteining computers in my basement, so I have a lot of non-professional computer background. )|||So, you think it is booting up based on drive activity I guess? If that is the case then I have two suggestions:



1. Are you sure your monitor is working? Even if you didn't have a operating system installed or a hard drive for that matter you should still see the POST message.



2. Try clearing the CMOS from the jumper on the motherboard. Perhaps when you switched up all the hardware you had some settings in the CMOS that were for something else (like AGP disabled or the like).



Good luck.|||your MoBo, CPU, or both is fried|||Does the BIOS even show up? Make sure you specifify a video display in the BIOS if it does. The main problem I see, is that your HD has the old motherboard drivers from the HP Intel MB and cannot talk to the older motherboard because of it.|||I want to know how you got a really outdated slot card processor into a motherboard with a socket. None of this really makes any sense because ISA was rendered obsolete before ghz+ chips ever existed. For someone who is still using a computer that has ISA I would recommend they send it to the recyclers because it isn't worth the power it draws. If the card you are using fit in almost all of the slots than it is a PCI graphics card and you need to disable the onboard or AGP bus to use it.