Discussion Attempting to Fix LG 32LB530A

[Palador]

Hi everyone.
First off, I must say that I'm new to the realm of TV repair.
However, a friend has been having problems for a while now with her LG TV. It works fine for sometime, maybe half-an-hour or longer, but then often the sound will cut off or the picture on the screen will start becoming distorted or something like that.
When it has the problem, sometimes just turning it off at the wall and turning it back on again gets things running, at other times it needs to be off for a while before it starts working properly again.
She put up with it for a while, but eventually took it to the service center. Since the TV is no longer under warranty, she would have to pay for the repair, but the amount they asked for repairing was basically 2/3 of what it would cost to buy a new TV, so she went ahead and bought one.
I asked her to give the old one to me to look at before she throws it out and today I took off the back panel to look at the boards and the power board didn't look like it was in good shape:

Closer look:

I also a look at the main board and while the top looked fine, the underside showed signs of discolouration (does that mean it's burnt?):

I just wanted to see if I could get any advice on it. I would think with the issue of it working for a while and then not working, it has something to do with overheating?
If you have any advice I'd appreciate it or even if there's any way to test whether they're working or not. I do have a multimeter, but don't really have much experience actually using it.
Thanks so much. Have a good weekend.

Edit: I'm not sure what's wrong, but when I try to embed the pictures I took of the boards, I can't save the post as it labels it "inappropriate content." I can't seem to post a link to the Google Photos Album either. Is Google Photos blocked?

 

[COLGeek]

Upload pictures to a site like imgur.com and then post a link to them here.

 

[Palador]

Upload pictures to a site like imgur.com and then post a link to them here.

I just uploaded them to imgur, but trying to embed the pictures gives me the same message and so does posting a link. When I try to embed the image, it says "Image cannot be loaded from the passed link." And when I try to just post it as a link. It tells me it may be SPAM content and to contact an administrator. Are you an Admin? Or how would I go about doing that. Is writing community@futurenet.com contacting an admin?
It's strange, I don't recall ever having an issue embedding pictures on Tom's Hardware, but I also get the same message there now whether I embed it from Google Photos or Imgur... Was there recently a change in policy regarding embedding pictures?

Is it okay to post the link like this: imgur.com/a/lg-tv-components-EvAmUvM