Hello from the South of France.
Well, after many years of faithful service, the blue tube on my VPH 1001 QM recently began to play up. Flickering and out of focus image. I have another unit for spares and replaced the blue tube from this. I also removed and cleaned the glass to clear the fungus build up on this tube and the green one but that's another story.
Re installed the projector, powered it up, and it ran beautifully ... for a day or so, then a lot of zapping noises and the unit died (I wished I could have turned it off quicker)!
I then changed all the ht components thinking that there must be a problem in this area and replaced the power supply board with a spare in unknown condition. Now the unit powers to 'stand by' without problem but try to power up and it runs for about a second, maybe two before cutting out. All three fans start to turn before stopping. The symptoms are the same using this board in my second unit so I suspect a power supply problem on the board. It sounds to be starting normally, just cuts out almost immediately.
I'm hopeless with electronics so any ideas as to what the likely cause of the problem could be would be gratefully received...