Viewsonic VP171b, orange screen, flickers

[Ken256]

Hello. I have an old Viewsonic VP171b. When first turned on the picture had a very orange color. Within 30 seconds the orange color improved, but some orange tint remained. There was also a slight, repetitive flickering of the image. After 15 minutes all of these symptoms disappeared and the image was perfect.

I have seen old laptops with permanently orange screens. I assumed this was caused by worn out CCFL bulbs. But I have never done CCFL replacement.

It seems the VP171b has some warm-up or temperature dependent problem. The thought occurred to me that the power supply to the inverter/CCFL could be at fault. Maybe low voltage or bad caps causes the orange color, and flickering?

I wonder if anyone could give opinion if these symptoms are the result of bad CCFL bulbs. I don't have the ability to bring much test equipment to the location of the monitor. Thanks!

[budm]

Re: Viewsonic VP171b, orange screen, flickers

Sounds like worn out CCFL to me, and if you keep running it, it may take out the inverter transformer.
Pink glow due to bad lamp, the ends of the lamps turn red hot and it will cause more melt down. The monitor this old should also have as set of caps in the power supply replaced.
http://s807.photobucket.com/user/bud...ml?sort=3&o=29
http://s807.photobucket.com/user/bud...?sort=3&page=2

[Ken256]

Re: Viewsonic VP171b, orange screen, flickers

Sounds like worn out CCFL to me, and if you keep running it, it may take out the inverter transformer.
Pink glow due to bad lamp, the ends of the lamps turn red hot and it will cause more melt down. The monitor this old should also have as set of caps in the power supply replaced.
http://s807.photobucket.com/user/bud...ml?sort=3&o=29
http://s807.photobucket.com/user/bud...?sort=3&page=2

OK. Thanks for sharing your CCFL pictures. Looks more like a bad CCFL bulb. Maybe not worth replacing bulbs. I'll pull them out and look. Thanks.