Hi Julien, I'm sorry that your TU7000 TV will not turn on. Please know we are here to help and have a few troubleshooting tips for you to try. First, since you mentioned the red light flashing on and off, please try to power the TV on through the button below the Samsung logo. If it powers on, I recommend changing the batteries on the remote and possibly replacing the remote. Next, please try the following: 1) Unplug the TV from its power source for 30 seconds. Then try to power it on again. 2) Try a different outlet that you have confirmed works properly 3) Press the Menu button on your remote. If the Menu appears, then this confirms your TV is powered on. 4) Confirm that the TV is set to the same source as the external device. 5) Test the HDMI cable. Go to Settings > Support > Self Diagnosis > Signal Information > HDMI Cable Test > Start Test. If the test says the cable is bad, replace the cable. Service is not required. 6) Test different external devices. The final thing to rule out is the external device you're using. Try connecting a different device or using a different source port. If the TV can display a picture in any other setup, then you've ruled the TV out as the cause of the issue. Keep trying various setups until you identify the device or cable that is not working and troubleshoot or replace it. If you need more help, Samsung is here for you. Please call us at 1-800-SAMSUNG, 8 AM - 12 AM EST, seven days a week. Our LiveChat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Advisor

Dansound: Thank you for your review of Samsung’s TU7000 TV and for sharing your experience with the screen flashing. If your TV is out of the 1-year Manufacturer's Warranty, you can locate a service center in your area on Samsung's website. Go to Support (upper right corner) and select Schedule a Service Appointment. This will allow you to find a location nearest you to help you with your repair. Should you have additional questions or wish to troubleshoot the issue, please call us at 1-800-SAMSUNG (ask for TVs), available 8AM - 12AM EST, 7 days a week. For additional support resources, visit us on the Samsung website and click on the ‘Support’ link in the upper right corner of the homepage for: 1) Chat with Us/Product Help: To begin a chat or find solutions, choose ‘TVs & Home Theater’ and select your model & topic. 2) Manuals, Software, & Warranty Info We hope to hear from you soon. ~ Samsung Advisor

Mike: Thank you for sharing your experience with the TU7000 TV. I am sorry that you are experiencing some issues with slowness and glitching. To optimize the smart TV performance, please try Device Care option under the Support Menu. Go to Settings > Support> Device Care > Start Device Care This service checks memory and frees up unused cached memory and closes background apps. I hope this helps to solve your concerns. Should you need further assistance, please contact Samsung Customer Support. 1-800-SAMSUNG (available 8AM -12AM EST, 7 days a week) Or visit us on the Samsung website and click on the ‘Support’ link in the upper right corner of the homepage for: 1) Contact Us Options (LiveChat, Remote Support, Facebook, Twitter) 2) Product Support 3) Manuals and Downloads 4) Warranty Info 5) Product Registration: Registering your product gives you access to easy warranty support, convenient opt-in to special promos and offers, faster troubleshooting and service, and quick notification of system updates 6) Samsung Community: A great resource for getting help from Samsung moderators and customers and more 7) …and more product, repair, order, and care options ~ Samsung Solutions