Xbox 360 won't display HD :(

[Big G]

I setup my xbox on Monday using the composite cables as I didn't have a HDMI cable at the time so now i have PSone quality graphics, but at least it's playable.

I borrowed a HDMI cable last night to try, but the TV just says no signal. When I goto the display settings the HDTV tab is greyed out. The TV is a cheap 20", but it does have a HDMI plug on it (only 1 lol).

I've used the HDMI port before so I can confirm that works and I've been told the cable is ok... I've got my own cable+xbox AV output thingy so I can connect my turtle beach properly which will hopefully be here today.

My next plan was to set it back to factory and start it up with HDMI plugged in.

[mdb_75]

Easy fix, get a ps3 lol!

Make sure your x box is only outputting 720p rather than 1080p/i (whatever xbox uses) as it could just be set too high for the tv if its only a hd ready one rather than full hd.

[alteredoggy]

it may be that HD is turned off in the TV menu
my TV was like this , had to tick a setting to enable it (for sky)

[Big G]

I'll double check that doggy. Probably cos it's 1 of those cheapo tesco TVs or something lol

playing on the composite connection is interesting lol. I can't see people in MW3 if they have a gilly on!

[MatJohnson]

Is the slide toggle switch set to HD on the lead on the back of the xbox?

[Big G]

which lead is that? I haven't spotted any switches on the back...

when I goto this screen


the HDTV bit is greyed out


-------

do you mean this switch?