Originally Posted by srockrae
I replaced the bulb in the housing of the VPL-VW100 about a year ago according to the instructions on this thread. Everthing OK until about three months ago where it just starting taking longer and longer to ignite the bulb. Sometimes up to 15 minutes. So I disassembled and changed to the silver grease. Still clicking and no immediate ignition but it shortened to about a minute or so BUT then one of the fans starting making a noise so I decided to go ahead and put two new fans in. The service manual was fairly straight forward and so I put the new fans in and reassembled. Now the darn thing turns on and I hear and feel the fans, they seem fine but I hear not clicking of the igniter. What in the world could be causing this. Any ideas of things to try before I bring it to the sony repair shop.
I've seen stuff like that happen with fans in electronics in general when the rpm sense doesn't work. The software will send power to the fans, then try to read the rpm speed. If the new fan is plugged in wrong or wired different internally it will read zero rpm (even though the fan has power and is spinning). The software then thinks the fan isn't running and won't even try the next step (igniting the lamp in this case). See if you plugged the headers in backwards (if possible), or verify the rpm sense is wired & implemented the same as the old ones. It would be a PITA, but you could put the old ones back in and see if it strikes.
You could also try resetting the lamp timer. Normally the only reason you open the lamp compartment is to change the lamp, and you reset the timer as part of the process. I vaguely remember the reset step being a requirement on a PJ even if the lamp wasn't changed, but I don't remember if it was a Ruby. Worth a shot.