Hi folks, I've discovered an issue with my MBP TB 13" which I have a feeling may signal a hardware failure, and wondered if anyone else has seen the same thing. I recently bought a GoPro and have been doing some 4k filming. After transferring these to my MBP, I managed to play about 5 mins of footage before a large number of pink horizontal flashing lines appeared all over the screen. Where areas of the screen were white they appeared more predominantly, but they generally covered the whole screen to the point where it almost was unusable. 10 minutes later these lines disappeared, notably when the MBP had cooled down. I have since tried playing these videos again several times and on every occasion have seen these lines appear once the machine starts to heat up. I've tried resetting the NVRAM with no improvement. Has anyone else seen this? I've had similar issues with previous windows laptops, all of which generally meant a fried GPU. I'm amazed this has happened so early after purchase though - this is the first time I've really asked anything trying of my MBP. Image attached. Cheers for any input.