1080 Monitor Composite Out is B&W

Tempest 2084 · 17 August 2010, 19:37

I have my Amiga 1200 hooked up to a 1080 via the RGB port and it works flawlessly. To save some desk space I wanted to hook my Atari 800XL up to the monitor using the composite port in the back, but all I get is a B&W image. I tried my Coleco Adam and got B&W as well. I know the cable works properly because I get color on my 1702 with it. Is there something wrong with my monitor or can it not do color composite on non-Amiga systems?

BTW I'm in the US so everything is NTSC. No PAL/NTSC mix ups here.

Tempest

rkauer · 17 August 2010, 20:28

Are you sure your monitor is not a PAL unit?

If it is NTSC, then something is wrong on the colour decoding chip (inside the monitor).

Tempest 2084 · 17 August 2010, 20:32

Quote:

Originally Posted by rkauer

Are you sure your monitor is not a PAL unit?

Yes, I'm 99.99% sure. The box even has a US retailer sticker on it.

Tempest

Tempest 2084 · 17 August 2010, 20:38

Dumb question, but if the color dial or tint were tuned all the way down would that cause it to be in B&W?

alexh · 17 August 2010, 20:51

Depends on the monitor but possibly. Some RGB inputs on monitors over-ride the chrominance adjuster.

Tempest 2084 · 17 August 2010, 21:04

Quote:

Originally Posted by alexh

Depends on the monitor but possibly. Some RGB inputs on monitors over-ride the chrominance adjuster.

The RGB input on this monitor isn't affected by the color dial, I know that as I read it somewhere. But I assume the composite is (otherwise why have an adjust at all?). I assumed everything was set correctly because the RGB looks right, but it just occurred to me that the dial may still be set wrong because it is ignored in RGB mode.

Tempest

Tempest 2084 · 17 August 2010, 23:59

Sigh, that was it. I turned the color dial back and BAM! color. I feel like an idiot now.

Tempest

meega · 18 August 2010, 00:07

Quote:

Originally Posted by Tempest 2084

I feel like an idiot now.

Tempest

There are plenty of those here, take your pick.

Loedown · 18 August 2010, 01:05

I prefer to think of it as 'professionally overlooked fault'

Good that it was a simple fix, colour faults can be nasty in TV / monitor to find.

17 August 2010, 19:37	#1
Tempest 2084 Prototype Historian Join Date: Apr 2009 Location: SE MI / USA Posts: 420	1080 Monitor Composite Out is B&W I have my Amiga 1200 hooked up to a 1080 via the RGB port and it works flawlessly. To save some desk space I wanted to hook my Atari 800XL up to the monitor using the composite port in the back, but all I get is a B&W image. I tried my Coleco Adam and got B&W as well. I know the cable works properly because I get color on my 1702 with it. Is there something wrong with my monitor or can it not do color composite on non-Amiga systems? BTW I'm in the US so everything is NTSC. No PAL/NTSC mix ups here. Tempest

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17 August 2010, 20:28	#2
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Are you sure your monitor is not a PAL unit? If it is NTSC, then something is wrong on the colour decoding chip (inside the monitor).

17 August 2010, 20:38	#4
Tempest 2084 Prototype Historian Join Date: Apr 2009 Location: SE MI / USA Posts: 420	Dumb question, but if the color dial or tint were tuned all the way down would that cause it to be in B&W?

17 August 2010, 20:51	#5
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,448	Depends on the monitor but possibly. Some RGB inputs on monitors over-ride the chrominance adjuster.

17 August 2010, 23:59	#7
Tempest 2084 Prototype Historian Join Date: Apr 2009 Location: SE MI / USA Posts: 420	Sigh, that was it. I turned the color dial back and BAM! color. I feel like an idiot now. Tempest

18 August 2010, 01:05	#9
Loedown Precious & fragile things Join Date: Feb 2009 Location: Victoria, Australia Posts: 1,946	I prefer to think of it as 'professionally overlooked fault' Good that it was a simple fix, colour faults can be nasty in TV / monitor to find.

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