Is my monitor erm 'regaussing' ???

[mootown]

Hi guys

After having lots of monitor issues, I finally settled on a 29 inch Pentranic for my cab. Not the picture is fantastic apart from a slightly bent bottom left corner but the problem is thus -

I turn it on and the monitor picture is all messed up like it's been magnetized - all the colours all messed. If I turn it on and off a few times (maybe 5 or 6 times one after another, with a few seconds wait) eventually I can USUALLY get the picture to be perfect.  And it will stay perfect for as long as it is on.

The second I turn it off, give it a min and then power back on (or even power back on 8 hours later) the screen is messed up again. So I have to do the turn it off, on off trick for a bit until it's right again.

Doing the wait 20 mins, turn on for a min, turn off repeat trick that I read up on doesn't help, as it just stays messed up.

Also, when I manually degauss using the on-screen menu, it has the opposite effect of degaussing and makes it worse. Once or twice it has made it better.

Any ideas? Could the degauss coil be reversing things or plugged in wrong or something? It's really annoying as I don't know if the monitor is going to be good or not everytime I turn it on. And I don't just want to leave it on constantly once I get to a good picture!!

Thanks for any input

[SirPeale]

It sounds like there's a "permenant" magnet somewhere in that vicinity - speaker, magnetized monitor frame - that's causing the colors to do that.

You could try moving the cab 90 degrees one way or another and see if it stops, but I suspect the above.

[mootown]

Well I have PC inside the cabinet, out of it's case and attached to a wooden shelf, then above that is another wooden shelf with the chassis on it.

The speakers are magnetically shielded and are above the monitor - when i got them I waved them in front of the screen to see if they did anything and there was not effect.

I also have a subwoofer at the bottom of the cab, but that's about 4 foot away from the monitor under 2 wooden shelves..

I don't understand why it would be perfect while it's on until I power down and then switch back on? Surely a magnet somewhere in the vicinity would be noticable on the screen at all times?

[qrz]

either the subwoofer is not shielded , or there is a problem with the deguassing circuit .


qrz

[mootown]

Well, the speakers/subwoofer are these:
http://www.geeks.com/details.asp?InvtId=Z3E&cpc=HFP

The subwoofer is in the base of the cab, and a good few feet away from the monitor with wooden shelves in between (2 shelves)

As the discolourisation varies from just being in the corners to pretty much the whole screen, and also if I have a nearly clear screen and try the manual degauss which then brings all the discolour BACK onto the screen - does that sound like the subwoofer could do something that extreme? And from the distance it is at too?

[whammoed]

Take the subwoofer out to see if there is a difference.  (The wooden shelves provide no shielding)

[Arm123]

Take the subwoofer out to see if there is a difference.  (The wooden shelves provide no shielding)

Yes, you’ll have to go threw the process of elimination to see what the cause it.

I would just pull the monitor out completely and run it outside the cab as far away as possible.   See what happens.