Question TV with power but no image

[kilvi00]

Good evening, my Technika 32" LED TV, model number 32F22B-FHD, lost all power, I opened it up and there was a burnt component on the power board, I ordered a replacement board, fitted it and it turned on first try, the red standby light turns blue as it should and I can see the backlight is on but there is no picture, nothing I press on the TV or remote makes a difference, I double checked all the cables were seated correctly but no difference. I hooked up a fire stick but still got no image or sound.
Anyone any ideas please.

Many thanks.

 

[helpstar]

disconnect and reconnect all connections

are you sure its the correct power board? maybe the new one is faulty as well

might be a follow up error or the t-con board is faulty as well

 

[kilvi00]

Hi, I removed the power board and reconnected it from scratch, all the codes match up for the board so maybe next step is to replace the T-CON board, I just didn't want to keep throwing money at it if it was just something easy that you guys knew.
Thank you.

 

[helpstar]

A good explanation video I found view years ago for basics and symptoms what could be defective in a TV

View: https://www.youtube.com/watch?v=hT4rUkN7Xn0

 

[kilvi00]

UPDATE: I removed the new board and had a look at it under the microscope and I discovered a burnt component, not sure if the board came like this or if it happened after I installed it but this is obviously the issue, or one of them.
I keep trying to insert an picture but it won't let me, the link might work.
https://1drv.ms/i/s!AvNikrN-PbCKgaRAMEEUcvxiYdeT2w

 

[helpstar]

you can upload pictures to imgur.com or similar and post the link here