Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Apple MS 17 inch display changes color temperature
Hi!
I have an Apple Multiple Scan 17 inch monitor--Series M2494 --that I picked up off of the curb. After cleaning and drying it all seems to be well. The image displayed is razor sharp, clear and very bright, suggesting that the tube and most of the monitor is in very good working order. There are two minor problems...when the monitor is first turned on, the color temperature changes. It is as though someone is changing the adjustment every few seconds, but there is no color temperature adjustment that I can see. When the monitor warms up, this problem usually goes away and is replaced by a whine from the flyback. Hitting the monitor or gently poking at components on the main board with an insulated stick produces no change in the color temperature, but the whine from the flyback will stop when it is prodded. I think I will just arrange for a well insulated, non flammable object to "poke" the flyback when the monitor's casing is in place. I'm not too worried about the shift in color temperature, as it stabilizes when the monitor is warmed up, but I would like to know if anyone has seen this before and has any ideas about fixing it. Also, does anyone know what the various controls on the monitor do? I've got the basics figured out, but I'm wondering about the "Apple Star" marked button as well as two very small buttons that require the tip of a pen to push. Thanks! William |
#2
|
|||
|
|||
As for the colour shifting as the monitor warms up, there may be some parts
that have become thermo sensitive with age. With proper troubleshooting, the defective components can be located, and then replaced. This will take some troubleshooting skills and experience to do a proper safe repair. As for the whistling noise, this can be something mechanicaly resonating with the flyback or an associated component. This can also be serviced. -- Greetings, Romeo E. Albert ============ "William R. Walsh" wrote in message news:LCZyd.252224$V41.232900@attbi_s52... Hi! I have an Apple Multiple Scan 17 inch monitor--Series M2494 --that I picked up off of the curb. After cleaning and drying it all seems to be well. The image displayed is razor sharp, clear and very bright, suggesting that the tube and most of the monitor is in very good working order. There are two minor problems...when the monitor is first turned on, the color temperature changes. It is as though someone is changing the adjustment every few seconds, but there is no color temperature adjustment that I can see. When the monitor warms up, this problem usually goes away and is replaced by a whine from the flyback. Hitting the monitor or gently poking at components on the main board with an insulated stick produces no change in the color temperature, but the whine from the flyback will stop when it is prodded. I think I will just arrange for a well insulated, non flammable object to "poke" the flyback when the monitor's casing is in place. I'm not too worried about the shift in color temperature, as it stabilizes when the monitor is warmed up, but I would like to know if anyone has seen this before and has any ideas about fixing it. Also, does anyone know what the various controls on the monitor do? I've got the basics figured out, but I'm wondering about the "Apple Star" marked button as well as two very small buttons that require the tip of a pen to push. Thanks! William |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
FA: Sharp 320 x 240 backlight monochrome touch screen LCD display LM32015T | Electronics Repair | |||
2 Morse taper extender to 3 taper, then 1 inch threading die holder | Metalworking | |||
atlas 6 inch compound rest same as 10 inch? | Metalworking |