09-11-2017
I have experienced this hardware issue in CRTs before. It can happen when the flyback transformer loses voltage due to shorting or from its driving transistors overheating. It happens most often when the screen is left on for long periods of time.
Try swapping in an LCD to see if the problem goes away.
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ACPI(1) General Commands Manual ACPI(1)
NAME
acpi - Shows battery status and other ACPI information
SYNOPSIS
acpi [options]
DESCRIPTION
acpi Shows information from the /proc or the /sys filesystem, such as battery status or thermal information.
OPTIONS
-b | --battery
show battery information
-a | --ac-adapter
show ac adapter information
-t | --thermal
show thermal information
-c | --cooling
show cooling device information
-V | --everything
show every device, overrides above options
-s | --show-empty
show non-operational devices
-i | --details
show additional details if available:
* battery capacity information
* temperature trip points
-f | --fahrenheit
use fahrenheit as the temperature unit instead of default celsius
-k | --kelvin
use kelvin as the temperature unit instead of default celsius
-p | --proc
use the old /proc interface, default is the new /sys one
-d | --directory <dir>
path to ACPI info (either /proc/acpi or /sys/class)
-h | --help
display help and exit
-v | --version
output version information and exit
AUTHOR
The original version of this manual page was written by Paul Telford <pxt@debian.org> for the Debian system. Newer additions were done by
Michael Meskes <meskes@debian.org>. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU GPL.
ACPI(1)