Easy LED LCD flatscreen TV repair results 7:00 & 7:30 checking tcon voltage, Share and Like if this helps, works on Apex LD4088, Samsung LN40A500T1FXZA, LN40A530P1FXZA, LN40B530P7NXZA TCON CONTROL BOARD # V400H1 or M$35-http://amzn.to/2iQo73d Shopjimmy.com "TV REPAIR" kit-http://bit.ly/2i55xWo Shopjimmy Tcon board repair video-https://www.youtube.com/watch?v=CWL0Y8g-TMo