Abstract of INFO-MAC archived Text file
   'info/hdwr/apple-13in-monitor-fix-r2.txt'
  Uploaded 02/09/1995   8586 bytes

Date: Wed, 8 Feb 1995 19:15:37 -0600
From: kuiyu@mail.utexas.edu (Kui-yu Chang)
Subject:  apple-13in-monitor-fix-r2

Document : apple-13in-monitor-fix.txt
Revision : 2
Date     : 31 Jan 1995
composer : kuiyu@mail.utexas.edu
           CHANG, Kui Yu (Julian)

1  MONITOR
----------
AppleColor 13" High-Resolution RGB monitor

2  PROBLEM
----------
Powers itself off sporadically, green power light goes off with switch still
stuck at 'ON' position.

3  SOLUTION 1
-------------
Adjust the variable resistor on the _back_ panel of the unit.

DETAILS

- On older models, this is simply the topmost control with a
  "mini-sun" icon beside it. 
- On newer models, this is accessible only after removing the
  case. This resistor is labelled "Cut-Off".

The picture brightness level will vary with your adjustments.

COMMENTS

Normally, this solution only works if the problem was caused by a prior over-
adjustment of this particular control/resistor.  My experience with a working
monitor is that if this brightness setting exceeds a threshold, the monitor will
power off automatically. Resetting it to a normal level solves the problem.

For my case, this was not the cause and thus SOLUTION 1 did not work.

4  SOLUTION 2
-------------
Replace the High voltage resistor.
(the 'RED' block, to be called the 'block'henceforth)
This is the big(about size of 2 cigarette boxes piled), red block sitting on the
bottom shield, with 2 suction wires attached _and_ 2 wires soldered to it.
On it is the part no. 1-230-666-21.
One of the suction wires leads to a suction cap on the CRT(Cathode Ray Tube).

DETAILS