I have a site that was making me about $200 per month comfortably up until about a month ago when AdSense stopped displaying ads. (Just a "page not found" in the blocks where the ads should be). At first I thought the site was slapped with a ban from Google (I was showing AdBrite ads on the same pages... could somebody give me a DEFINITIVE yes or no answer as to whether this is acceptable to Google's TOS or not?) Anyway I removed the AdBrite Ads and I think I am fully compliant with Google's TOS but before I emailed their support to appeal, I noticed I was getting some page views and a few clicks - but I still don't see any ads on any of my pages! The Adsense for Search shows up and works fine but no ads! Does any body have any idea what is happening? Is there some sort of Google semi-ban that I don't know about? Can Google ban certain pages on a domain while others slip through the net? Is this just a cockup on their side? Oh ...nearly forgot... the site is at http://freetrivia-and-pubquizquestions.com
It may be some problem with your ads, or it may be a ban. Maybe try redoing your ad code and trying a different placement and seeing if they work then? Usually you will get at least PSA's if its a ban (I think), so it may be a problem with the code on the page.