When I push the power button it lights up, but the picture and sound do not come on

What does the power indicator on the front of the set do when the on button is pushed?

Try changing input on remote.

Try switching any channel button. If not then your TV needs repairing.

It sounds to me like you need a repair person to look at this..
Sorry couldnt help more.

This is very common in sharp tvs.U turn it on.U get power on light stable right?U hear a click,one or twice,sometime tv is good right?Sometime POWER light and OPC light flashes?Push the power button on/off couples times will work, picture will come on.If keep trying off/on couples time after POWER and OPC flashes,don't ever stop and never get backlight and picture.Ur Video backlight board is dead must replaced.

When you push Power Button on remote, TV goes to Standby state i.e its power light (LED) lit but no picture / no sound. Power button on remote has symbol looks like.. ( ! )

Can you please supply us with the make and model as well as the blink count of the green light. That count should be indicating the problem circuit. Once that info is posted, we should be able to give you more details and possible solutions.
Dan

Unplug it from the wall, wait 2 minutes and plug it back in. if problem still exists, its probably the main pcb.

Hello Chac c,

The reason that you are getting a 'red light' is because your lamp is burned out. There is a panel on the back of the TV that gives you access to this lamp. You can remove it and check the part# to be sure then replace it. I did a quick search for you just based on the model# which you provided. You can see it here - http://www.nextag.com/serv/main/buyer/OutPDir.jsp?search=samsung+lamp&gg_site=&gg_aid=1295966762

Hope this helps :)

make checks in the all power circuits if you are not a tech take it to a repairman