When I run a HDMI cable from my ATT box tomy new HD TV it won't show an image.  The 5 wire works OK and I get an HD picture, but nothing with the HDMI cable (I tried 3 different cables-none worked).  Any suggestions?

I already know the answer to this one…

First of all, understand that HDMI is a handshake technology.  That means that the set-top box and the TV communicate on a level below that which you see on the screen.  Also, HDMI is not a standardized technology.  Sony's HDMI is slightly differnt from Toshiba's HDMI which is different from Sanyo's HDMI and so on.  Every Tv manufacturer produces their own approximation of HDMI.  This means that not all set-top boxes will communicate properly with all TV's. 

This problem is more pronounced on the Cisco set-top boxes than on the Motorola set-top boxes.  I had the opportunity to talk to a Cisco rep. about this and to be honest only received a promise for an emailed white paper on the subject which I never received.  The only real solution is to try the HDMI cable on another set-top box and TV combination.

In the meantime, HD component cables will show 1080i just as well as the HDMI cable would have, if it had worked.  I run into this sort of thing on a fairly regular basis. 

Regards in HDMI functionalty

Dave

supersonicdave said:

I already know the answer to this one…

First of all, understand that HDMI is a handshake technology.  That means that the set-top box and the TV communicate on a level below that which you see on the screen.  Also, HDMI is not a standardized technology.  Sony's HDMI is slightly differnt from Toshiba's HDMI which is different from Sanyo's HDMI and so on.  Every Tv manufacturer produces their own approximation of HDMI.  This means that not all set-top boxes will communicate properly with all TV's. 

This problem is more pronounced on the Cisco set-top boxes than on the Motorola set-top boxes.  I had the opportunity to talk to a Cisco rep. about this and to be honest only received a promise for an emailed white paper on the subject which I never received.  The only real solution is to try the HDMI cable on another set-top box and TV combination.

In the meantime, HD component cables will show 1080i just as well as the HDMI cable would have, if it had worked.  I run into this sort of thing on a fairly regular basis. 

Regards in HDMI functionalty

Dave

Very interesting!  I only have one HD TV, maybe I could pull one of the UVerse Motorola boxes out of one of the bedrooms and try it.?>?  You said HD component cables will show 1080i just as well as the HDMI cable would, will it show 1080p?  If I have to use component cable, how would I hook up another device like a blue ray player?  The Mitsubishi TV only has room for 1 set of component cables and 3 places for HDMI cables?

Thanks for your time Dave!

Uverse Guy said:

……..

On another note no provider offers 1080p broadcast, their all 1080i. Now most new tv are cabable of 1080p and blu-ray is in 1080p but all HD channels are broadcasted in 1080i.

For what it's worth….Not correct.

Both Dish and DirecTV now broadcast limited programming in 1080p.