Follow these methods: Method 1: Connect a Standard VGA display to the computer and check if it works. a) Click Start and click Control Panel and then click on Personalization. b) Click on Display Settings. c) Under Display Settings click the Settings tab. d) Then Select the monitor display from the drop down under Display. Use freeze spray to identify it, unsolder the heat sink, clean well, then use a good heat sink paste and resolder the heat sink back on. You can try turning the backlight down in picture settings as well. Menu-picture-Backlight. It is factory set at 100. Try turning it down to 50, then bump it up by 5 until the picture blinks. This article provides information and troubleshooting steps when seeing the No Signal message on Android TV™ or Google TV™ models. This message usually appears when you select an input that's not connected to an active device or when there's an interruption or weak signal from the source device (antenna, cable box, satellite receiver, Blu-ray Disc™ player, etc.). Switch on the power and switch on your TV using the physical power button located somewhere on its case (usually beneath the Toshiba Fire logo). See if the red light is solid. If so, this means your TV is getting sufficient voltage. If your Toshiba Fire TV’s red light is blinking 5, 6, 10 times, or more, then repeat these steps with another 1. Reboot the TV First, switch off your Toshiba TV at the power outlet. Press and hold the power button on the front panel if the TV presents a black screen. Whereas if the TV displays an image, the remote batteries are either low or dead. Replace the remote batteries and attempt turning on the TV again with the remote. Go to the “ Find ” > “ Search Icon ” on the “ main Fire TV screen “. Download “ AirScreen ” from the “ App Store “. After it is opened, click “ Confirm “. The TV screen will display a “ QR code ” > Scan it with your iPhone. At the top of the screen, tap on the Safari link and then select Entire screen. On the remote No picture, yes, toshiba fire stick tv #43LF621U21, y, tv is a fire stick tv, cant tell screen is blank, no - Answered by a verified Electronics Technician We use cookies to give you the best possible experience on our website. To do that, follow these steps: Unplug the TV and wait 5 minutes. Remove the buffer and see if you get a picture with sound. If your TV has two buffers, disconnect the upper buffer and see if you get a picture on the lower screen. Then disconnect the lower buffer and see if you get a picture on the upper screen. xkeW.