Multiple Scan 17 Display: Degausses then dies

[Dog Cow]

I was kindly given an Apple Multiple Scan 17 Display the other day, which has a peculiar problem.

The very first time I plugged it into a Mac, I turned the both of them on, and saw the happy Mac for a split second on the display, then it went out! The power light on the display turned off! After disconnecting it and trying to turn the display on a few more times, it appears that as soon as the degauss is done, the click sound, the monitor just shuts down.

Anyone have any ideas about fixing this? My first foolish thought was to disable the degaussing mechanism, but I have no idea how that might be done.

 

[Dog Cow]

I found this message: http://www.mail-archive.com/pci-powermacs@mail.maclaunch.com/msg06277.html

Fri, 26 Apr 2002 22:03:38 -0700

On 27/4/02 3:31 am, "Robert Newman" <> wrote:

 

 

>>> Hi:

>>>

>>> I was just given an Apple ColorSync 17 inch monitor. I used it for about 3

>>> days, and suddenly the screen just goes black. The green LED goes out also.

>>> You can turn it off, and then back on and it works for a few more minutes.

>>> This is one beautiful monitor, and I would like to fix it. Does anyone have

>>> a link for the service manual, or have any suggestions as to what the

>>> problem may be. I am back to using an excellent Apple 15 inch, but it just

>>> doesn't compare to that beautiful 17". By the way, it seems that I find

>>> more dead 17" monitors, that 14" or 15". Is it because of the power demands

>>> because of the large screen?

>>>

>>> TIA,

>>> Robert Newman

 

Apples ColorSync monitors perform well, but were one of the most unreliable

products they made. Their warranty was extended, but this option has now

long expired. Even though they are getting on a bit now, I still repair

quite a few.

 

The most common problems relate to poor soldering, the worst areas being the

power supply filter inductors, horizontal yoke connector, flyback

transformer B+ pins and generally all around the horizontal deflection area.

There are also a multitude of known hardware problems varying from high ESR

capacitors, leaky transistors to defective SMD components within the video

board. If you want to tackle the repair yourself I'd recommend you only try

resoldering the board. You won't find any of this listed in the Apple

'service manual' as the Apple service method is to board swap. It will

advise you how to pull it apart.

 

Steve Bell

 

It sounds similar to my problem.