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

Hello!
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.