Beautiful work. However, my modern LCD flat screen TV set uses the "No-Fuss Ribbon Cable Connectors" and I think they are fairly common in this application.
"Step 2 — No-Fuss Ribbon Cable Connectors
Occasionally, you'll find a ribbon cable that simply pulls out of its socket, with no retaining flap.
These kinds of connectors are fairly rare, so check carefully for a way to release the connector before you resort to pulling on the ribbon cable."