I have a Sharp lcc3234u I followed your guide and replaced the bad ccfl lamp now all the lamps come on but they go from dim to bright then out. Then the green power light starts blinking again. Power Supply maybe?

Make sure you connected all the plug wires in tight and the pc flat ribbon wires to the top of the lcd panel (which has a flip up connection on the lcd plug side that has to be pulled up with your thumb nail and hold the ribbon wire in all the way as you push the connection down to connect it.) When you power the tv on look at each ccfl lamp and see if one is dim or not as bright or has a pink color to it. I had a second lamp on my tv that was bad and had a pink color but lite up and it kicked the power off like your tv is doing. After I replaced it the tv worked find. For some reason these tv`s will get a bad ccfl lamp from time to time. You might buy another ccfl lamp and remove each lamp one at a time and put the new lamp in it starting at the top and going down checking all 10 lamps one at a time this way you will find the bad one. If the tv still will not power on then I would replace the power supply board and the tv should work then. If you need to buy the power supply board go to partsstore.com and put your model # in the search to get the part #. If you need help finding the part # let me know and I will try to help you fine it. After you find the part # you might find a good or new power supply board on Ebay.com at a lower cost. I bought a spare new power supply board on Ebay.com for near nothing for my tv.