Is a man permitted to watch tv or movies that feature immodestly dressed women? Assuming one will not have improper thoughts, is it prohibited to look at an immodestly dressed woman on a screen? Are images on a screen included in the prohibition of ervah? Is there any limmud zechus for the common practice of watching tv or movies?
Chacham Ovadia in Yechavei Daas 4:7 writes that seeing a woman on tv is the same as seeing an actual woman when it comes to hirur (thoughts) and there is an issur of lo tassuru achrei levavchem...however when it comes to reading shema that's a discussion which he talks about whether its mutar or not,but an issur of seeing a picture of a woman who is not dressed properly is assur,he brings many sources.
The Rivevos Ephraim 6:pg 576 also discusses this issue of seeing a womans hair on tv,but also mentions the issur of tv.
Rabbi Nebontzol in his Kuntres Hanhagos writes tv is assur,and if one is in a room with someone who has inappropriate pictures he can take them down without permission.