My olevia 242-s11 want turn on changed power supply and main board whats next

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main 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. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
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do you have a picture?

Most likely you have a fault in the power supply or main board. I would start with checking the power supply capacitors.

most of the stuff from jimmy's its second hand ( not good working or working maybe) first and the last i suppose you got a problem with the power supply on the T con on the second i suppose you have a problem with the big chip in the middle the scalier :D

It's not a firmware update, you do have a problem with the main board giving the power supply an ON command. Please have it looked at by a qualified technician.

Most likely, bad capacitors in the power supply.

Most likely the CCFL inverter has been the problem all along....

You can try the following manual for the AEP016-37 power board:

http://blog.coppelltvrepair.com/2013/08/olevia-237-t11-power-aep016-37-testing.html

Hope this helps!

I have pictures of the USB port, as well as the procedure of what I did, once the USB trick quit working here: http://www.flickr.com/photos/geegee123/sets/72157607269121264/

I have the Olevia 65 inch LCD TV and cannot find the comcast remote code for my TV! Any help?