Too much signal jitter is likely present which is causing the connection to constantly reset.
Unfortunately, not all HDMI sources are created equal. HDMI signals from consoles that have been rigorously tested such as Sony’s PS4, Microsoft’s Xbox One, or PC graphics cards will have the cleanest and strongest HDMI signals with the least amount of jitter. On the other hand, older devices or devices from smaller organizations that are not able to get HDMI certifications may have signals that include lots of jitter. This jitter makes it difficult for the receiving HDMI device to recognize what the HDMI source is trying to communicate. If the connection builds up enough jitter, the connection breaks, and the devices must reconnect. This makes the screen appear to flash off and on repeatedly every few seconds or so.
While an abundance of jitter could be caused by a defective mClassic or mCable, it is usually not the case. While rare, if there is a defect with either of those devices, most of the time the result is simply no picture at all. Sources of jitter in order from most to least common are:
1. Low rated or damaged HDMI cables
2. HDMI adapters for retro consoles that produce large amounts of signal jitter
3. Low rated or damaged HDMI switches and splitters
4. Low rated or damaged capture cards
5. A defective, damaged, and/or a TV sensitive to jitter (particularly Samsung TVs)
6. A defective mClassic or mCable
The mClassic has undergone rigorous testing to receive HDMI’s certification for creating a low jitter HDMI signal for 480p (SD), 720p (HD), 1080p (FullHD), 1440p (QHD/2K), and 2160p (4K) resolutions. However, upscaling any HDMI source will amplify whatever jitter already exists. In other words, a 480p signal with high jitter might be ok for your TV to handle. But, when it is upscaled to 1080p or especially 1440p, your TV may have trouble locking onto the HDMI signal.
To isolate the problem, you can start with trying a different HDMI 2.0 or higher rated extender and HDMI cable to your TV. If that does not change anything, please take out any HDMI switches, splitters, and capture cards that may be connected between mClassic and your TV, or mClassic and your console.
If the problem persists after these steps, please email support.