Hi All, recently I posted about my tribulations with a noisy motherboard.
I was testing with just the bare minimum of components, which included cards in the slots. For grins I loaded up the PCI slots with cards, and the system got quieter. Note, there were no cables, just the cards plugged in. And yes, the back panel holes were covered when the cards were not in. :-) This is an older MB, with ISA slots too. I have no cards for these. Could they be ringing, and causing the few spikes I have left? If so are there dummy loads I could plug in the slots to damp the ringing? The same board has multiple uses...... Also noted that adding the keyboard dramatically adds to the emissions, the mouse not so much. The Fe bead on the cable doesn't help much... Thoughts anyone? Thanks, Derek N. Walton Owner L F Research EMC Design and Test Facility Poplar Grove, Illinois, USA www.lfresearch.com
