CurtPalme.com Home Theater Forum

[snkby]

night before last i put in a bluray disc and had this weird horizontal banding going on.

never had any indication of it ever before.

one night it wasnt there and the next it was there.

seems to be there throughout but gets really bad during a scene where the image changes from bright-dark or dark-bright.

changed cables and hd fury and sources to no avail but when i switched to input1 i had a beautiful stable image.

input1 is being used for htpc sd-dvd and input2 for all hd sources.

i removed the input2 card and reseated it several times with no luck.

any ideas ?

thanks

[Tim in Phoenix]

Hello

What sort of card is in the 02 slot?


.

[snkby]

its a standard rgbhv.

im handy with a soldering iron if you can tell me what needs to be replaced.

thanks.

[Tim in Phoenix]

[snkby]

so why do i have a perfect picture when i switch the fury over to 01 ?

[Nashou66]

it could be the relay connections On the VIM are corroded for input 2. the vim switches the relay to move the video from input 1 to 2 so maybe those relays are
dirty? I have never heard of it but it could be the problem. Just a thought. Try cleaning the contacts for the second RGBHV board too.

Athanasios

[snkby]

i pulled the 02 board and reseated it several times with no difference.

going to open it up and just reseat everything and see what happens.

let me know if you think of anything else.

thanks.

[1031]

Check that you got all setups at picture menu similar to input 1. Sync=normal/fast, clamp=auto, etc...

[snkby]

well..........tonight i had the hd sources hooked-up to 01 and i got banding!!

after about 1min it went away.

i reached around the pj and fiddled with the vga-rgbhv cable and it was fine.

i switched to hdtv and it was gone so i figured it was either the bluray player or the bluray cabling.

switched back to the bluray and the banding was gone from there also!

going to try a different hdmi cable tomorrow from the bluray player.

jeez i hate intermittent problems!!

[snkby]

what the hell!!!!

so now ive replaced :

1) hdmi switch

2) dvi-hdmi cable feeding the pj

3) hd fury with and without psu

4) bypassed switch and went direct from bluray to pj

and the banding is still there!!!

the banding happens with any hd source on both 01 and 02.

but i have a beautiful stable and clear image if i use either 01 or 02 with the htpc running 1280x960@72hz.

ive tried auto clamp on/off and it has to be -on-.

ive tried different internal frequencies.

ive tried trace long/short.

ive gotten aggressive with all cable connections trying to make it either stop or get worse but nothing seems to make a difference.

so the only description i can come-up with is : i get sporadic horizontal banding on both 01 and 02 when using an hd source and no banding when using the htpc on either 01 or 02.

anyone have any more ideas ?

thanks.

[Gino]

when you have your htpc connected, is it the same recall memory as your hd source?

[snkby]

originally the htpc was 01 and the hd was 02.

i had 01 set for 4:3@72hz and 02 set for 16:9@60hz.

hd signal path is......bluray/hdtv/hddvd/-->5-port hdmi switch-->hdmi-dvi 25'cable-->hd fury with lambda regulated psu-->vga-rgbhv-->marquee8000 02

when doing the troubleshooting and switching the rgbhv connectors between 01 and 02 i was leaving the setups original just for troubleshooting.

the thing that gets me is that the night before it starting banding everything was beautiful!

nobody changed anything on the pj or anywhere else.

i was so hoping that bypassing the 5-port hdmi switch was going to reveal it as the culprit but it didnt.

so the only thing that hasnt been physically swapped-out is the breakout vga-5bnc between the fury and the pj.

that will get replaced tomorrow when an order arrives but i think it wont make any difference as i got pretty aggressive with the connections trying to make it better or worse and nothing happened.

the banding will occasionally go away for a minute or so and then come back.

where the banding occurs the image is much darker.

and the banding doesnt roll or stay static either but seems to be activated with high-contrast images.

for example....if there is a bright lamp in an otherwise dimly lit room scene the banding will be above and below the light and make those portions really dark.

so it has got to be something with the way the pj is seeing the hd signal as both 01 and 02 work beautifully with the htpc.

thanks.

[Gino]

do you see the banding on the internal full white test pattern?

[snkby]

i have an extremely very light evenly spaced banding from top to bottom that divides the screen into about 10 bands.

but i cant tell you if thats normal or not as ive never looked at the full-white screen looking for banding.

and the banding that happens with hd stuff is all over the place and very dynamic in height with some bands being only a few inches and others being a few feet and all simultaneously and changing all the time.

its not like there is any -pattern- and it seems driven by the scene of the movie.

wait a minute!!

i remember pausing the scene and the banding stayed in place and was -captured-!

i remember thinking how weird that the banding also paused.

so i guess i can capture a pic if you need one.

dont know if i could capture a pic of it or not.

so what would cause the banding to pause as in a screenshot ?

because its not the player as the banding happens with all hd sources.

thanks for the help everyone.

[draganm]

[snkby]

so what is it about the hd signal that would cause this ?

i mean its analog to the pj whether its from the htpc or after the hd fury.

so whats so special about the hd signal that it still carries something or is missing something when it get to the pj ?

going to do the cleaning as suggested but id still like to understand the -why- of it all.

thanks.

[Nashou66]

it could be the timmings that each sends that the marquee has a hard time syncing too, the marquee , as i was recentlly told, does not like short H sync and V sync signals they must be a bit longer than 1.5 ms, in the HTPC it might be higher, with the hd sent straight into the HD fury you have no control for the signal timings, the HD source your using might not have long enough sync timings for the marquee, but this is just a theory and i think its the contacts on the chips too
since you never had this banding before with the same set up, unless you changed something in the video chain recently.

Athanasios

[snkby]

thanks for the theory!

yes..nothing was changed in the video chain that might have started the banding.

one night it was all beautiful then the next night i had the banding.

going to do the cleaning tonight and report back.

thanks again.

[snkby]

crazyassshit!!!!!!!!! gaaaahh!!!!!!!

so i remove the board and the chips and clean the sockets with contact cleaner and scrape the legs of the chips with an exacto knife and then contact cleaner.

put it all back together and i still have banding.

so just for kicks i connect my htpc via vga->dvi transcoder direct to the 02 and i get a nice band-free image.

then i connect it through the hdmi switch and reconnect the bluray through the switch and switch back and forth with movies playing in both the htpc and the bluray player and no freaking banding!!!!!!!

gaaahh!!!!!!!

so im settling in to watch -the italian job- on the bluray player right now and will post tomorrow what if anything happens.

[snkby]

well...........i sit down to watch and take it off pause and there is the banding again.

i did notice that when the scene was bright and evenly lit there was no banding.

when the scene was dim the banding would make it even dimmer.

and when there was a lot of differing contrasts the banding followed those.

at one point elliot goulds entire head was really red and the entire lower half of the image was fine.

i have an 8110 in the garage but i dont know if it has good boards for swapping.

any ideas ?

thanks.