Components:
Dell SX2210 - using HDMI connection (using an Alba brand which is the cheapest one bought from Argos - no probs with it as it delivers 1080p perfectly, as every HDMI cable should
)
Logitech X-540 - 5.1 speaker but not really REAL surround sound, just matrix/virtual. 3.5 to main and red and white jacks at the other end.
My monitor doesn't have speakers so I'm using external speakers. I don't have the official HDMI cable (and the audio adapter as well) so I figured I'd use the official component cable AND a third-party RGB SCART cable. So this is how the setup is:
~ represents cable
360 > HDMI > Monitor
360 > Official AV cable/3rd party cable ~~ Red and white jacks > RCA sockets ~~~~ 3.5mm jack > Mains/subwoofer
Audio works fine but the monitor is not picking up any video signal.
And yes, both the HDMI and the AV cable are plugged in properly on the 360 (I took out the shell so the both cables would fit)
What I'm thinking is that the AV cables I used provide video connection as well. Is that why I am not getting any picture? Do I have no option but to buy the official ones? If I have to, are they gonna work 100%?
Thanks in advance for any help!
Dell SX2210 - using HDMI connection (using an Alba brand which is the cheapest one bought from Argos - no probs with it as it delivers 1080p perfectly, as every HDMI cable should

Logitech X-540 - 5.1 speaker but not really REAL surround sound, just matrix/virtual. 3.5 to main and red and white jacks at the other end.
My monitor doesn't have speakers so I'm using external speakers. I don't have the official HDMI cable (and the audio adapter as well) so I figured I'd use the official component cable AND a third-party RGB SCART cable. So this is how the setup is:
~ represents cable
360 > HDMI > Monitor
360 > Official AV cable/3rd party cable ~~ Red and white jacks > RCA sockets ~~~~ 3.5mm jack > Mains/subwoofer
Audio works fine but the monitor is not picking up any video signal.

What I'm thinking is that the AV cables I used provide video connection as well. Is that why I am not getting any picture? Do I have no option but to buy the official ones? If I have to, are they gonna work 100%?
Thanks in advance for any help!