Strange Comcast problem

mitchell172 · 07-03-2009, 09:28 PM

I had Comcast installed today at my new place. I'm using a Motorola DCT-6412 to a Samsung Tantus DLP HLP467W. I have some other components I plan to put the in the way but just wanted something for now. When the guy came buy, he hooked it up and all looked ok. After he left I noticed after a few minutes that the screen was then black at the DLP was indicating "not supported mode". It is setup correctly pulling signal from the component inputs. I've played around with it and I can get S-video to work and if I shut everything off for a few minutes sometimes I can use the component cables and other times not. I wonder if the box is bad. It looks well used - the box that is. Comcast said someone would come out "immediately" whatever that means to replace the box. Here I sit in my new place with at least internet. Any input is greatly appreciated. I trust you guys more than the installers.

Thanks,
Brad

Filekhasper · 07-03-2009, 09:47 PM

I noticed sometimes if a box has multiple outputs hooked from it it will do that... e.g. you have cable out hooked into the tv+component also, It really wouldn't hurt to call and get some assistance with the problem. If it worked when he installed it, I doubt it would be a bad box... It definetely could be tho. I've had similiar problems resolved by simply by unplugging the box AND tv, i guess these suggestions can't hurt?

mitchell172 · 07-03-2009, 10:39 PM

I've got it hooked up now with s-video using the standard audio out from the cable box. Comcast is supposed to replace the box so that will be interesting. I just have the input into the box and then the s-video and audio outs. Before, I just had the same input into the box from the wall and the component video to the TV and nothing.

davecramer74 · 07-07-2009, 01:50 PM

you can just go down to your local comcast office and swap the box out for future reference. You dont have to wait for them to come back out. I use to take mine down there every 6months for new ones.

mitchell172 · 07-09-2009, 02:44 PM

I went to the local office and swapped the box out. It didn't solve much. However, I did figure out that on dvr items and on "on demand" items it goes to "not supported mode". Some channels also cause this to happen. If I switch the inputs on the TV from 1080 to 480 then i can "see" it. A friend of mine told me I need either a new TV or a new receiver to convert the signal. Any ideas? I hate to buy a new anything since these work.

Thanks!
Brad

deadhead68 · 07-09-2009, 04:01 PM

Quote:

Originally Posted by mitchell172

I went to the local office and swapped the box out. It didn't solve much. However, I did figure out that on dvr items and on "on demand" items it goes to "not supported mode". Some channels also cause this to happen. If I switch the inputs on the TV from 1080 to 480 then i can "see" it. A friend of mine told me I need either a new TV or a new receiver to convert the signal. Any ideas? I hate to buy a new anything since these work.

Thanks!
Brad

Have you tried setting the DCT6412 to output 720p?

DeadHead68

mitchell172 · 07-09-2009, 04:07 PM

Probably not since I don't know what that is. : ) I take it that is the comcast box?

deadhead68 · 07-09-2009, 04:56 PM

Quote:

Originally Posted by mitchell172

Probably not since I don't know what that is. : ) I take it that is the comcast box?

Yes, that's the Comcast box. Try this.

With the TV power on, turn off the cable box
Push the menu button
Select 16X9 for your TV type
Select 720 in the HDMI settings
Press menu
Power on cable box

DeadHead68

mitchell172 · 07-09-2009, 05:09 PM

Another friend just suggested to use my DVI inputs on the TV with an HDMI adapter and run the signal just from the comcast box HDMI out to the TV for video and then run an optical cable from the audio out on the comcast box to my receiver. Sound good?

Brad

07-03-2009, 09:28 PM	#1
mitchell172 My plasma is High Def. Join Date: Jul 2009 Posts: 5	Strange Comcast problem I had Comcast installed today at my new place. I'm using a Motorola DCT-6412 to a Samsung Tantus DLP HLP467W. I have some other components I plan to put the in the way but just wanted something for now. When the guy came buy, he hooked it up and all looked ok. After he left I noticed after a few minutes that the screen was then black at the DLP was indicating "not supported mode". It is setup correctly pulling signal from the component inputs. I've played around with it and I can get S-video to work and if I shut everything off for a few minutes sometimes I can use the component cables and other times not. I wonder if the box is bad. It looks well used - the box that is. Comcast said someone would come out "immediately" whatever that means to replace the box. Here I sit in my new place with at least internet. Any input is greatly appreciated. I trust you guys more than the installers. Thanks, Brad

07-07-2009, 01:50 PM	#4
davecramer74 High Definition is the definition of life. Join Date: Oct 2005 Location: Bay Area California Age: 35 Posts: 1,008	you can just go down to your local comcast office and swap the box out for future reference. You dont have to wait for them to come back out. I use to take mine down there every 6months for new ones. __________________ Vizio 42" LCD Phillips 50" plasma

07-09-2009, 02:44 PM	#5
mitchell172 My plasma is High Def. Join Date: Jul 2009 Posts: 5	I went to the local office and swapped the box out. It didn't solve much. However, I did figure out that on dvr items and on "on demand" items it goes to "not supported mode". Some channels also cause this to happen. If I switch the inputs on the TV from 1080 to 480 then i can "see" it. A friend of mine told me I need either a new TV or a new receiver to convert the signal. Any ideas? I hate to buy a new anything since these work. Thanks! Brad Last edited by mitchell172; 07-09-2009 at 03:10 PM.

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07-03-2009, 09:47 PM	#2
Filekhasper High Definition is the definition of life. Join Date: Feb 2009 Posts: 41	I noticed sometimes if a box has multiple outputs hooked from it it will do that... e.g. you have cable out hooked into the tv+component also, It really wouldn't hurt to call and get some assistance with the problem. If it worked when he installed it, I doubt it would be a bad box... It definetely could be tho. I've had similiar problems resolved by simply by unplugging the box AND tv, i guess these suggestions can't hurt?

07-03-2009, 10:39 PM	#3
mitchell172 My plasma is High Def. Join Date: Jul 2009 Posts: 5	I've got it hooked up now with s-video using the standard audio out from the cable box. Comcast is supposed to replace the box so that will be interesting. I just have the input into the box and then the s-video and audio outs. Before, I just had the same input into the box from the wall and the component video to the TV and nothing.

07-09-2009, 04:07 PM	#7
mitchell172 My plasma is High Def. Join Date: Jul 2009 Posts: 5	Probably not since I don't know what that is. : ) I take it that is the comcast box?

07-09-2009, 05:09 PM	#9
mitchell172 My plasma is High Def. Join Date: Jul 2009 Posts: 5	Another friend just suggested to use my DVI inputs on the TV with an HDMI adapter and run the signal just from the comcast box HDMI out to the TV for video and then run an optical cable from the audio out on the comcast box to my receiver. Sound good? Brad