Composite input problem

i'm running a connection to my DLP projector from my Sky box via Composite but it is causing diagonal lines, does anyone know the cause of this? and a solution?

Cheers,
Ryan

Judging from recent history, The Negotiator is our resident expert in this field I think!

Not at all, though I did come across that problem when sorting out my component lead problem.

See? I knew i was right!

Have you tried giving it dirty looks and kicking it?

its not man problems helz

I wonderd where I was going wrong

Helz's party trick and killer chat up line all rolled into one!

i found it was caused by a bad earth connection, the image has improved alot now.

Just "a lot" or completely?

just alot at the moment, its removed the diagonal lines but the image still isnt crystal so i will look into it later, i think its just because of a poor connection though.

A poor connection is inevitable using composite leads. Don't you have any possible alternatives ?
Composite is the lowest quality out there, you need component or even RGB scart would be better.

the projector will accept all of those inputs but the sky digital box only has scart out which i am just using composite, can i buy an RGB adaptor to use with my RGB projector lead?

You Sky box has RGB output, you just need to a SCART to RGB cable. To be honest on the majority of domestic kit you won't even notice a difference between RGB and Composite inputs as the signal is heavily compressed at the head end. I suspect you have an earth loop problem which can be a pain to find.

Even in the post production studios they use composite inputs on the graded monitors for colour correction.

You can make it yourself if you feel like it, the pin outs for the Sky box are below.

1 Right audio output (±6dB) Right audio output (±6dB)
2 Right audio input Right audio input
3 Left audio output (±6dB) Left audio output (±6dB)
4 Audio ground Audio ground
5 Blue ground Blue ground
6 Left audio input Left audio input
7 Blue output Blue input
8 0-2.5 volts (low) when:
- digibox is in standby (or digibox is out of standby & 'Scart control' setting is "OFF')
- VCR is not in playback or onscreen graphics (OSG) mode

4.5-7.5 volts (High-to-6v) when:
- digibox is out of standby,
- 'scart control' setting is 'on',
- picture format setting is '16:9',
- digibox is outputting a 16:9 programme
or when:
- VCR is in playback or OSG mode

9-12 volts (high-to-12v) when:
- digibox is out of standby,
- scart control setting is on,
- picture format setting is '4:3' (or set to '16:9' but digibox is outputting a 4:3 programme)
or when:
- VCR is in playback or OSG mode. 0-2.5 volts (low) when:
- VCR is not in playback or OSG mode

4.5-7.5 volts (High-to-6v) when:
- VCR is in 16:9 playback or OSG mode

9-12 volts (high-to-12v) when:
- VCR is in 4:3 playback or OSG mode
9 Green ground Green ground
10 N/C N/C
11 Green output Green input
12 N/C N/C
13 Red ground Red ground
14 N/C N/C
15 Red output Red input
16 0 volt (low) when:- pin 8 of the TV scart is low
or when:
- pin 8 of TV scart is high-to-6v / high-to-12v,
- video output setting is 'PAL'

1-3 volts (high) when:
- pin 8 of TV scart is high-to-6v / high-to-12v,
- video output setting is 'RGB',
- digibox is out of standby
or when:
- pin 8 of TV scart is high-to-6v / high-to-12v,
- VCR is in OSG mode 0 volt (low) when:
- pin 8 of VCR scart is low

1-3 volts (high) when:
- pin 8 of VCR scart is high-to-6v or high-to-12v,
- VCR is in OSG mode
17 Composite video output ground Composite video output ground
18 Composite video input ground Composite video input ground
19 Composite video output Composite video output
20 N/C Composite video input
21 Ground Ground

All nintendo Wii's came with composite cable and the image was really poor especially highlighted on HD tv's. If I didn't get my component cables I would have settled for RGB scart, it's a steadier image than composite and in my experience has always produced better colours too.

You can buy pretty much anything these days, try www.maplins.com
I have used them for loads of stuff that I thought couldn't be done. If you are stuck with what to buy then give your local store a call and they will sort it out, they are really helpful