I'm having a problem with video on an old 486/50 computer.
After a few minutes (the exact time varies) it will lose color and brightness. The screen will be less than half as bright as normal and all in shades of grey and black instead of colors. I may be able to use the computer for half an hour before the video does this or it may do it in 3 minutes.
Sometimes it will correct itself if I reboot the computer. Sometimes not.
It does this with different monitors attached so it's not the monitor.
It does it with 2 different video cards, one of which worked fine in another computer.
I've tried reseating the video card, but that doesn't seem to be the problem.
I'm thinking it is something to do with the motherboard - maybe a loose connection somewhere. Anyone run into anything like this before? Is it likely to be restricted to a particular slot or is it worth testing each slot separately? I could try a VLB card instead of the ISA card that is currently installed. Testing different slots would involve punching through metal in the back of the case or I'd have done it before now.
After a few minutes (the exact time varies) it will lose color and brightness. The screen will be less than half as bright as normal and all in shades of grey and black instead of colors. I may be able to use the computer for half an hour before the video does this or it may do it in 3 minutes.
Sometimes it will correct itself if I reboot the computer. Sometimes not.
It does this with different monitors attached so it's not the monitor.
It does it with 2 different video cards, one of which worked fine in another computer.
I've tried reseating the video card, but that doesn't seem to be the problem.
I'm thinking it is something to do with the motherboard - maybe a loose connection somewhere. Anyone run into anything like this before? Is it likely to be restricted to a particular slot or is it worth testing each slot separately? I could try a VLB card instead of the ISA card that is currently installed. Testing different slots would involve punching through metal in the back of the case or I'd have done it before now.