Smart TVs give apps far less memory to work with than a dedicated streaming box or Firestick does. When a player app runs low, it doesn't always crash outright; it can draw a black frame and stay technically open while it struggles to keep the channel list and current stream in memory at once. That's different from a signal or HDMI problem, where the TV usually shows a 'no signal' message instead of a plain black screen inside the app itself. Telling the two apart saves you from chasing a cable issue that isn't there.

Open a channel from a different category first. If only one channel goes black while others play, that channel's source stalled and has nothing to do with the TV. If the app goes black on every channel after running for a while, that's the memory pattern above. If the TV shows black immediately on opening the app with no picture ever appearing, check that the TV's output resolution matches what the app expects; a mismatch here can produce a black frame that looks identical to a stalled stream but has a different fix.

Force-close the app completely rather than pressing home and leaving it running in the background; smart TV platforms rarely free memory from a backgrounded app on their own the way a phone does. Reopen it fresh and test the same channel again. If that doesn't hold for long, clear the app's cache and data from the TV's app settings, which resets its memory footprint entirely rather than just restarting the process. Hiding channel groups you don't watch reduces how much the app has to keep loaded at once, which matters more on a TV's limited memory budget than it does on a dedicated streaming box.

If the black screen started right after your TV or the app updated itself, that's a distinct cause from ordinary memory pressure: a post-update regression in how the updated version handles decoding or rendering the stream on your particular TV model. Check whether a further update is available that addresses it before doing anything else to the app's settings. If not, reinstalling the app resets it to a clean state, which resolves a real share of these cases without waiting on a patch that may or may not arrive soon from the app's developer.