First post, by seanneko
I recently replaced the motherboard in my 486 with a different model and have been having issues with it since. Everything was fully working before, and I didn't change any configuration.
- Chicony CH-498B socket 3 motherboard
- Intel DX4 100
- 2x 16MB 72 pin FPM
- 1MB VLB ARK1000PV
- VLB I/O controller
- Sound Blaster Pro 2 CT2600
When digital sound is enabled in games, the computer will hang/reboot after a random amount of time, but usually no longer than a minute or so. When playing games with digital sound disabled, or games with Adlib only support, it seems to run indefinitely with no issues. I left Doom running overnight with sound disabled and it was still fine the next morning.
I've run memtest86+ overnight and it found no errors.
I changed the sound card settings to try different IRQ, DMA, etc. Made no difference. I don't believe there are any resource conflicts.
I formatted and installed Windows 98 out of interest to see if it behaved any differently to straight DOS 6.22, but it seemed to be exactly the same.
I'm pretty confident that the sound card is fine considering I never had any trouble on the old motherboard.
Has anyone seen anything like this before? I'm running out of ideas for things to try. Surely it's not a broken motherboard since it's 100% stable apart from this one problem.