ACFT EQUIP PROBLEM STUCK MIKE.

Narrative

LAX LOST AN ILS VISIBILITY AT LAX WAS RPTED AS 9 MI. ZAB METERING DECIDED TO IMPLEMENT HOLDING IN OUR FAC (800 MI FROM LAX). ZAB SECTOR 70 HAD 5 ACFT HOLDING WHEN THEY GOT A STUCK MIKE. THEY WERE UNABLE TO CONTACT ANY OF THE ACFT TO AFFECT SEPARATION. I WAS WORKING AN ADJACENT SECTOR; AND I SENT SEVERAL ACFT TO THEIR FREQ IN AN ATTEMPT TO BRING SOME OF THE OTHER ACFT BACK TO MY FREQ. 2 OF THE ACFT HOLDING AT FL350 HAD CONFLICTING TFC. ACR MLG FLT CAME TO MY FREQ WHEN HE WAS APPROX 10 MI FROM IMPACT ON A COLLISION COURSE. I GAVE HIM AN IMMEDIATE DSCNT TO FL330 AND ISSUED TFC. HE SAW HIS TFC AND MANAGED TO GET LEVEL AT 330 BEFORE SEPARATION WAS LOST. BOTH THE PLT AND ALL THE CTLRS INVOLVED WERE VERY CONCERNED ABOUT THE OBVIOUS POTENTIALLY DISASTROUS SITUATION. THE OTHER ACR HOLDING AT FL350 WAS INVOLVED IN A SYS ERROR BECAUSE NO ONE COULD GET A HOLD OF HIM TO SEPARATE HIM FROM ACR Y. THE POINT OF THIS IS THAT ENRTE HOLDING CAN BE VERY DANGEROUS AND SHOULD NOT BE IMPLEMENTED UNLESS ABSOLUTELY NECESSARY. I DON'T BELIEVE THAT LOSS OF AN ILS WITH 9 MI VISIBILITY NECESSITATES ENRTE HOLDING 800 MI FROM THE ARPT. GRANTED; METERING COULD NOT PREDICT A STUCK MIKE; BUT WHY PUT OURSELVES IN ANY DANGEROUS POSTURE.