Hi flash79, Thanks for your review. If you're seeing a “No Signal” or “Weak Signal” error, try the following: 1. Check the source: Make sure your external device is turned on and connected securely. Press the left directional key on your remote to access Connected Devices > Sources, and confirm the correct input is selected. 2. Reconnect cables: Remove and firmly reconnect all HDMI or AV cables. Try different ports or cables if possible. 3. Run a test: Settings > Support > Device Care > Self Diagnosis > Picture Test or HDMI Troubleshooting 4. Antenna users: Settings > Support > Device Care > Self Diagnosis > Broadcast Signal – adjust for better signal. 5. Run Auto Program: Settings > All Settings > Broadcasting > Auto Program If you still need help, please call Samsung Support at 1-800-SAMSUNG (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat). Our LiveChat agents are also available through the Support link on our website. ~ Samsung Advisor

Hi Jselover, We’re sorry to hear that the picture on your Samsung U7900F TV appears too dark. If this isn’t meeting your expectations, there are several settings you can adjust to improve the overall brightness and clarity of your screen. First, try disabling certain energy-saving features that may be dimming the screen automatically. Go to: Settings > All Settings > General & Privacy > Power and Energy Saving, then turn off Brightness Optimization, Energy Saving Solution, Motion Lighting, and/or Contrast Enhancer. Next, adjust the Picture Mode to better match your viewing environment: Settings > All Settings > Picture > Picture Mode and choose from the following: • Dynamic – Brighter and clearer for well-lit rooms • Standard – Balanced for most environments • Movie – Ideal for watching in a dark room • Eco – Designed for energy savings • Filmmaker Mode – Preserves the creator’s original intent You can also manually adjust brightness by going to: Settings > All Settings > Picture > Expert Settings > Brightness. Use the slider to set a level that suits your preferences (0–50). Finally, we recommend making sure your TV has the latest software installed: Settings > Support > Software Update > Update Now We hope these tips help improve your viewing experience. If you need further assistance with setup or adjustments, feel free to contact Samsung Customer Support at 1-800-SAMSUNG (8AM – 9PM EST Mon – Fri, 8AM – 6PM Sat – Sun). You can also LiveChat with an agent through the ‘Support’ link on our website. ~ Samsung Advisor