The Samsung SSSP2 and SSSP3 LFDs have been around for quite some time, and some models seems to work more stable than others, they are somewhat more sensitive than their newer brothers, but they can be quite stable too. In fact, one of the most stable Samsung SSSP models we have in production is SSSP2 based, so, don`t give up. Here are a few tips.
On a general note, related to all models, we recommend to seek, find, download and install the latest firmware on these models. SSSP2/3 being an old platform, the latest, possibly even the last firmware for these models works very good and stable. Just remember to install all firmware modules, on old models, it can be up to 4 of them.
Further, introduced in more recent firmware, the URL launcher must be exact. Earlier releases accepted the URL without the http: and the www, but not so any longer. The correct URL for Databeat OMNIplay installations MUST be full: https://www.databeatomni.net/sssp
On these monitors, even on later Samsung SSSP models, the network API seems to load slow, and late in the boot process, therefore the "Network disconnected" appears for no real reason. I see this even on my fairly new Samsung Tizen home TV quite often. There is nothing wrong with the network, but the message appears regardless. I learned to leave it be, TV boots just fine anyways.
Well, don`t forget the obvious, sometimes the network can be disconnected, or there is something wrong with it. I have seen many situations, but when I run the network connection test in the UI (ie the URL launcher), it always told me the truth (even on my Tizen home TV), so give it a go, test the network connection. If it says it is offline, it probably is.
If you find nothing wrong, but you still have issues, a good old fashioned restart may help. Even better, start gain by recycling the power. This works best, when the SoC computer is is responsiveness, and no action on the remote control seems to work.
Best of luck !