Replaced 3 capcitors today and tv still wont power up, element flx3711b lcd tv

Sounds like bad capacitors on the power supply board which is a very famous issue for most LCD TV power supplies.

Tv LCD Screen panel are cost the same as a new tv,bacause the picture screen panel are 90% importmant to the tv.Tries websites like Shopjimmy.com,Ebay.com might have refurbish tv LCD screen panel for sale.

you will need the power specs of each unit, look on the tv and computer near where they plug in, should be tagged right there or somewhere close. by law it has to be tagged. if not right there keep looking . and yes it is specific.

Tv now have LED indication power light on the screen panel blinking light or totally dead,no light at all?The power supply board,that the board where the power a/c cord plug into it.That the power supply board is dead.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Bad power board, it could be a regulator circuit in the board and you can troubleshoot it if your good at electronics as those switch mode power supplies can be a little tricky sometimes, it may make more sense to replace the board though, generally they aren't that expensive, under 50 bucks generally

try the code 0178

go to the generic search and let the remote lock on the code itself.

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. Look for 5vdc, 12vdc, and 24dvc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

UNIT IN WARRANTY SEND TO SERVICE OR CALL BESTBUY IN HOME SERVICE

Bad control board. ~$300. Take TV back to wherever you bought it if still under warranty or Purchase new TV.