Question about HP P1100 21" CRT Monitor

4 Answers

Small annoyance with HP P1100 monitor. Slightly darker vertical lines.

Hello, I have a small annoyance with my current monitor. At two different places at my monitor I can see two slightly darker, vertical lines. They aren't black, they're just slightly darker than the rest of the monitor. The lines are hard to spot, but they are definitely there. I tried to turn off the monitor and turn it back on, but no result. Degauss did not work either. If anyone can give me any advice on this, please let me know.

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  • Daniel Fjeldstad Dec 20, 2006

    I do not know how old it is, as I am borrowing it from a friend. Is there an easy way of finding out how old it is?



4 Answers

This is completely normal and the lines are there for a reason. Due to the nature of Aperture Grill displays (i.e the majority of top end CRT monitors) there are two faint lines visable that look like there cutting the screen into a third. These lines are caused by two thin wires that run perpendicular to the grille which are used to maintain equal spacing between the vertical wires of the grille. It's very annoying when you first notice this, but you will get used to it.

Posted on Sep 22, 2007


If this is an lcd monitor,try to gently massage the area in which the lines are located,sometimes this can bring back what is referred to as dead pixals,there is a 50% chance that it will work,but good luck!

Posted on May 07, 2007


This screen uses a Sony Trinitron CRT and it's actually part of the invar mask if I'm not mistaken. This is a normal condition for this monitor.

Posted on Mar 28, 2007

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Sounds like dried out electrolytic caps. How old is the monitor ?

Posted on Dec 19, 2006

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this is real old right
no photo off i messing up, how can we guess, what you see?
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I will give you a small step through which you would be able to know whether its a hardware or its a software issue.

You need to log in to the BIOS. Do not change anything in the BOIS just check whether you have that red line in the BIOS.
If you see the line while you are in the BIOS, that means its a hardware problem and you need to contact the manufacturer (In this case HP ). You should get a replacement if its under warranty.

If you do not see the red line in the BIOS than it is a software issue and you need to start with reinstalling the Display drivers.

Note : - Steps to go to BIOS. ( Dont change anything in BIOS )
Turn off the computer
As soon as you turn it on start tapping the key "F2". ( "Del" in some brands).

Hope that will give you a good insight.


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whats it plugged into.
my guess its plugged in to some unnamed PC.
try it on , another PC yet, that monitor ,new will no recognize old monitors.
test the monitor , then if its ok then the unstated PC is at fault./
you have 2 boxes there, 1 or other is faulting.
easy no?

May 19, 2017 | HP P1100 21" CRT Monitor

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