Replacement Is better In guarantee/warranty period Otherwise u can Check it To nearest Technician, Often in Power Supply Capacitor/condenser become impaired or are ripped ,
same thing happend with me when i bought solid 3000 it happend with me twice the box was in guarantee period i took the box to shop no 746 and he repaired the box with in 2 days :angry
Main reason for this to happen is,
Connecting wire to LNB when the power is on,
Trying to fit the wire with connector when box is powered,
Trying to disconnect from DiseqC switch and re-connecting it when power is on.
Do not perform any disconnect/Connect operation when your STB is still switched on.
make sure the connector is fitted firmly to LNB, when you are adjusting the LNB to get maximum signals.
Any short circuit at the wire, the IC which is there in the board gets busted and ultimately your dealer/seller has to put another spare board to make it working.