A judge has given two companies three days to turn off 77 digital billboards across Los Angeles.
Superior Court Judge Terry Green ruled Friday that CBS and Clear Channel Outdoor must turn off the billboards by 5 p.m. on Monday.
City Attorney Carmen Trutanich says more than 20 other digital signs will be the subject of a hearing Tuesday.
Many of the billboards went up in Hollywood and other neighborhoods after the two companies struck a deal with the City Council in 2006.
They drew protest from residents who say the brightly illuminated ads create blight and shine into their yards and homes.
Clear Channel spokesman David Grabert said his company, which operated 67 of the signs, will take all legal steps to renew operation of the billboards.