What action should you take if your No. 1 VOR receiver malfu…

Whаt аctiоn shоuld yоu tаke if your No. 1 VOR receiver malfunctions while operating in controlled airspace under IFR?Your aircraft is equipped with two VOR receivers. The No. 1 receiver has Omni/Localizer/glideslope capability, and the No. 2 receiver has only VOR/Localizer capability.