Sansui SV-4210 LCD HDMI TV. I suspect it is a faulty main board but not sure. Problem happens especially in the mornings when trying to switch it on again.
Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
SOURCE: Periodic tv screen blackouts
The problem is your cable box. I know you said you replaced it, but I work on TV's everyday and, sorry to say this but cable box HDMI outputs have serious issues, like no or intermittent sound and video. I have seen customers exchange their cable boxes 5 and 6 times and still have the problem. Your best bet is to use the component outputs of your cable box, visually you will not see a picture difference between component and HDMI when using a cable box. Your other solution is to get satellite; I have NEVER seen an HDMI issue with a satellite box
SOURCE: HDMI connectivity
I have the SA8300HDC STB from Time Warner. I get this error from my DVD recorder, not from my HDMI connection. I've read that the error is due to copy protection. The only solution I've read about has to do with a new Samsung Set-top box from TWC. Funny this copy protection error didn't ever come up with my old VCR connection to the HDTV. TWC apparently told a lot of people that the problem would be solved by a software update from TWC in October 2007 & then in December 2007. Guess TWC isn't sure what the problem is but everyone who has mentioned this Samsung cable box has reported success with their HDMI connection.
SOURCE: TV switching to standby
Hi.i had exactly the same problem with my bush 37 inch lcd tv and i took it to a friend of mine who is a t.v electrician he said it was a component in the back of the tv which he replaced and its now working fine.
SOURCE: LG 42 LCD no sound or picture
Did anyone find out the solution for this??????? I have the exact same problem with my LG 32 LCD. I only had it for a year and a half, and the green light blinks a few times and it shows no picture. Not even a red light when the tv is off. The same thing happened a couple weeks ago and by some miracle it started working again.
SOURCE: LCD TV picture is green
I just called Vizio and they said to unplug the TV, then physically hold in the power button on the TV for 2 minutes.
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