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From: mwm@dunsel.berkeley.edu (Mike Meyer)
Newsgroups: net.micro.amiga
Subject: Leaving the Amiga On and screen burnin
Message-ID: <1319@jade.BERKELEY.EDU>
Date: Sat, 20-Sep-86 21:06:10 EDT
Article-I.D.: jade.1319
Posted: Sat Sep 20 21:06:10 1986
Date-Received: Sun, 21-Sep-86 22:04:37 EDT
References: <2222@gitpyr.UUCP> <170@sas.UUCP> <2254@gitpyr.UUCP> <739@cbmvax.cbmvax.cbm.UUCP> <214@zen.BERKELEY.EDU> <6@ritcv.UUCP>
Sender: usenet@jade.BERKELEY.EDU
Reply-To: mwm@dunsel.UUCP (Mike Meyer)
Distribution: net.micro.amiga
Organization: Missionaria Phonibalonica
Lines: 43
Keywords: hello CRT monitor

In article <6@ritcv.UUCP> new7582@ritcv.UUCP (Norman E. Wright <NEW>) writes:
>I think this is true. Thermal stress from turning components on and off
>can sometimes cause more wear and tear than leaving them on.

I asked questions about that when I first bought my Amiga. The answer
(from someone at C/A) was "the Amiga was designed to be left on."
Leave the CPU on, with disks in all drives to avoid checks for
inserted disks.

>However, I also wonder about the crt.  Many of the junk and
>scrap electronic shops I visit have lots of monitors with burned
>in patterns from being left on too long.  Its probably a good
>idea to leave something running that changes the display
>from time to time if you are going to leave the Amiga on all the time.
>(Maybe this doesn't really apply to the latest
>and greatest CRTs, though) (comments?)

If someone has a monitor that doesn't burn in, I'd sure like to hear
about it.

I know of at least two things that try and solve this problem. I wrote
a little program that puts a digital clock on a black (000) screen,
and pushes it around at random. On Fish disk #35 you can find PopCLI
from The Software Distillery. PopCLI will black your screen out if
there is no input activity for an adjustable period of time.

(PopCLI also catches Left-Amiga-ESC and runs a settable command,
defaulting to NewCLI. Hence the name. The Software Distillery should
be congratulated for what they've done, and encouraged to continue
doing it. If only their policies looked more like those of the Free
Software Foundation.)

The problem with both of these is that a black Amiga screen isn't
black, it's kinda grey. The retrace lines (I assume they are retrace
lines) stay on, even in interlace mode. My solution is to run PopCLI
and let it black the screen if I'm going to gone for a short period of
time (less than a couple of hours). Other than that, I turn the
monitor off. Could somebody please tell me if the "black" of a 000
screen will prevent burnin, and if not, how long the screen should be
black before turning it off becomes a better option?

	Thanx,
	<mike