Light Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 16
Troubleshooting; Human-Machine Interface; Situational Awareness; Communication Breakdown
ATC Issue All Types
Air Traffic Control Issued New Clearance
ATC Equipment / Nav Facility / Buildings
Aircraft X; was on a base for the ILS Runway 12 at BZN. There were 4 other aircraft being vectored for the ILS at the time. The BZN sector utilizes three radar feeds (QSI; BZN; QVA) and is FUSED. An error message appeared in the STARS status area that both QSI and BZN radars had failed. In addition; all of the frequencies for the sector failed as well. There is NO 121.5/243.0 available at this sector. As soon as I realized what had happened; I broadcast on the emergency backup frequency for 118.97 and issued Aircraft X a vector to join the localizer even though I had lost radar on the target. The terrain rises north and east of the localizer and the MVA is 8300. Aircraft X was at 7600. I attempted several times to relay through other aircraft but all the frequencies had failed. I called BZN ATCT and the controller stated that Aircraft X was on their frequency and was 30 seconds from joining the localizer. I asked BZN for a position from Aircraft X and the tower stated 4 miles from MANNI and established on the localizer. I then cleared the aircraft for the ILS Runway 12 approach.There was a known issue throughout the building with no internet for reports; no way to obtain NOTAMS or no indication that this issue may affect the radar feed at this sector. If known; I could have assigned non radar separation to all of the arrivals to ensure a loss of radar would have little effect except efficiency.
Boise TRACON Controller reported losing radio and radar contact on an aircraft inbound to an airport in mountainous terrain.