after installing latest firmware from file 42pfl5603d_12_fus_eng.zip, the TV does no more show DVB-T channels, despite having them before upgrade and no change from the cable operator

Also, during full channel autoscan, there are no digital channel detected, no more separate row for found digital channels, no capability to test digital reception (there was), no working program guide button on the remote (nothing shows up anymore)

The upgrade went smoothly as per instructions, the TV works fine, but only analogue channels are shown

Anyone's advise/suggestions are welcome