I have a used Philips 40PFH5509 smart TV. I haven't really watched it at all. And the smart part of it sucks, there are no apps I would use. But recently it didn't turn on anymore. Before it used to take a lot of time until it turned on. My brother once said that he has a broken computer display and I said I can look at it. I opened it and noticed that some capacitors were bloated. I bought new ones and replaced the broken ones and hey presto! It turned on and worked. So, I had experience that it can be possible to fix a broken display. I opened my TV and checked the circuit boards. There was two boards, one for power and one for all the smart TV stuff. And like I little bit expected, there was something interesting on the power circuit board.

You can see some of the capacitors in the latter image are bloated. So, I decided to replace them all 5. 330µF and 25V. They cost only 1.20€ on some Finnish electric shop, though shipping was around 5€. Not much to try to fix the TV for fun really.

Getting the broken ones was difficult. I was trying to use a solder sock first to get most of the solder away but it didn't really work out. Then I ripped the caps off leaving their legs on the board. Then it was easy to heat from the other side and pull with pliers from the other side. Soldering the new caps just an task, although I'm not an experienced solderer, maybe you can tell from the picture.

After soldering I just put everything together and plugged the power cable in and turned the TV on. And it turned on immediately! No waiting while it's turning on or anything and the image looks normal. 2/2 now trying to fix displays. At least you can fix these kind of capacitor related issues easily.