Originally Posted by Ken54321
Has the silver compound worked?
Yes and No.
I have two complete housings with heat sinks and lamps.
#1) has 510 hours on it and was chirping like the dickens. This lamp was purchased to replace lamp #2 that had 818 hours on it at the time it was replaced because of chirping. This lamp has the gray vinyl coating that encircles the juncture between the front and rear sections of the lamp.
#2) has 818 hours on it and was sitting idle until I was able to cheaply purchase a replacement housing with heat sinks only. This lamp has a hard paper divider between the front and rear sections of the lamp.
I purchased the Spire silver thermal compound and mounted lamp #2 in the replacement housing. Of note, the two part front heatsink assembly fit Very tightly over the front of the lamp. Finished reassembly of the heat sink and housing and tired it. Two hours later no chirping, maybe what I thought was a slight fan whine, but otherwise silent, (could be the lamp singing).
With lamp #1 removed from the projector, I dissassembled the lamp and heatsink assembly, cleaned the lamp and heatsinks and reassembled using the Spire thermal grease. I noticed that the front heatsink assembly on this unit was still relatively loose. I removed the retaining clips and lightly crimped them to increase their clamping preasure. This helped but the front heatsink assembly still did not feel as solid as on the previous unit although it seated squarely on the front of the lamp. I reassembled the unit and reinstalled it in the projector. This unit was silent for the first 30 minutes then started chirping...lightly at first then grew in intensity. I left this unit in the projector. Each subsequent time I started the projector, this unit took less and less time to start chirping. It now starts silently but begins chirping from 5 to 10 minutes after I turn the projector on. Relative to before the application of the Spire thermal grease, the chirping is about half as loud.