Regarding EMI/EMC - How to reduce radiated frequency from Imx6ull SOM

We are using iMX6ULL Viola plus v1.2 carrier board with Colibri iMX6ULL 512MB WB IT SOM. The carrier board is enclosed with a plastic enclosure.
A 7.0” WVGA 800 x 3 (RGB) x 480 High Brightness Capacitive Touch TFT Display is connected to a carrier board by an FFC cable (length of around 40cm)
We validate by near field probe, that there are some radiated frequencies (166MHz@75.8dBuV, 199MHz@77.6dBuV, 233MHz@76.4dBuV, 299MHz@79.2dBuV ) we observed while performing the EMI/EMC test.

Please suggest how we can reduce the radiated frequencies.