Hi there,
From your description, I'm leaning towards it being a hardware issue with the card. But just to be sure, try as many steps as you can out of HP's wireless troubleshooting guide. You might also want to run the Support Assistant, and have its diagnostics look for any internal or connection problems: https://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03446545#N451
Hope that helps, Wally