Colour cycling / Dell monitor service menu (was: Feature request, but must be universallly accepted by ALL blanker authors)

Gene Heskett gheskett at
Mon Oct 5 08:04:43 UTC 2020

On Sunday 04 October 2020 23:50:42 Adam Nielsen wrote:

> > It turns out that the color cycling screen was that old 17" 4x3 Dell
> > lcd monitors response to the synch drop that shuts most modern
> > monitors off.
> Someone has probably enabled burnin test mode on this monitor.  The
> method to switch it on and off is pretty much the same on all Dell
> monitors.
> Switch the monitor off with the power button on the front panel, then
> hold the 'menu' and '+' buttons at the same time while you press
> 'power' to turn it on again.  Keep holding both 'menu' and '+' while
> the screen is blank, letting go a few seconds later once the normal
> display appears.  This brings the monitor up in service mode.
> When in service mode (depending on model) you can press the '+' or '-'
> buttons to bring up the service menu, or on older monitors you have to
> go into the normal menu (which now displays some additional model and
> firmware version numbers, confirming you're in service mode) and go to
> the 'factory reset' option.  Normally the factory reset menu gives you
> a submenu with yes/no options, but with service mode active you get a
> third menu option that will take you to the service menu.
> In the service menu, look for the option called 'Burnin mode' or
> similar and switch it off.  This will cause the monitor to actually go
> into powersaving mode when there is no signal, rather than go through
> the colour cycling test mode you're seeing.
> Once you've made your changes, exit the menu and switch the monitor
> off and on again with the front panel power button to exit service
> mode.
> Cheers,
> Adam.

Thank you Adam. Printed and carried up the hill to the shop for 
prompting. I spotted it, looking pretty new, at a yard sale nearly 20 
years ago, and brought it home for a $20 bill. Its been above and behind 
a CNC'd 7x12 lathe ever since, but the lexan sheet in front of it is 
much the worse for hot flying swarf.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
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