Please help! Need help Diagnosing/Troubleshooting TV! (Video included)
Yesterday my TV decided to stop working and I'm having trouble diagnosing the issue.
Here's a video of the issue: https://youtu.be/F8IWaukZyHg
The TV will work properly for around 30-60 seconds.
Then the sound will briefly slow down before the TV "crashes".
It stops responding to the remote (normally a light below the TV flashes when a remote command is received) and a whining noise can be heard at the rear.
After this happens, unplugging/replugging the TV in will cause the power LED to light, but there's no picture, sound or responses to button presses/remote.
Disconnection from power for 10 minutes or so is the only way to get it to show an image again, followed by the usual crash.
I've opened it up check cables and capacitors but all seems fine.
Due to the slowing of sound just before it crashes, I feel it may be a lack of sufficient power to the TV, either the fault of the external PSU or the power board in the TV itself.
This is simply based on how other devices react to low power though, I'm not an expert by any means!
If you have any ideas then please let me know!
I'd like to figure out the cause before I start randomly buying replacement parts in an attempt to repair it.
As requested, here are some pictures of the TV's boards.
Inverter board Caps:
Side Main Board:
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