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"du1" code on box

I've had my TV and HD DVR connected using an HDMI cable for over a year with no problems. I haven't made any connection changes since then. All of the sudden I've been getting the "du1" code this morning and the box shuts down. I disconnected it from the wall and it didn't help. I googled the problem and checked here and read about the "handshake" issue. I've replaced the HDMI cable with a component cable and while the "du1" proble was resolved, the picture quality is now crap. Any ideas as to why I'm having this problem all of the sudden and if there is a fix that will allow me to go back to using the HDMI cable?

I'm not overly technical so dumb it down for me 😉

EDIT: Problem solved...box somehow reset itself and SD override was not switched to off. Now it is, HDMI cable hooked back up and all is good.

Comments

Hubrisnxs

yeah the DU1 code, is actually saying DVI, and you're right it's a HDCP handshake issue - some people had it resolved by swapping HDMI ports in the back of the tv most had to go to component cables.

Verizon had a new software release in most areas (not all) that corrected a great number of HDCP handshake issues.

My guess is that you were in one of those area's, but thanks for letting us know it's working again. gives us a chance to revisit the topic a tiny bit.

for others that are having an ongoing issue with this DVI error on the front of the motorola STB's, a def perm fix is going to component cables, which are also 1080p rated high definition cables, or try swapping HDMI ports on the back of the TV.

Tommy76

I also have had the du1 code...it happens every time i start up the dvr but it doesnt seem to cause any issues...i am on 1.7 on the 7xxxx box and have hdmi to dvi cord since my tv is only dvi, then an optical audio going to my reciever...i guess im lucky since i dont really have any issues steming from the flashing code

mjg

psu319, what do you mean when you say that SD override was not switched to off? My husband & I are having this same issue. Only difference is that our Sharp tv doesn't fade to snow...just goes to black then comes back on after a few minutes.

rogerp1000

I am also having this problem!! I only have 1 HDMI post on the back of my TV though and i refuse to go to component cables!! I was wondering if trding in the box for the newer HD DVR box would fix this issue?

Keyboards

@rogerp1000 wrote:
I am also having this problem!! I only have 1 HDMI post on the back of my TV though and i refuse to go to component cables!! I was wondering if trding in the box for the newer HD DVR box would fix this issue?

Maybe yes, maybe no. Before IMG 1.7 my 7216 had the HDMI the black out (it "hiccupped") glitch and it was fixed with 1.7. However, there are still reports of people with 1.7 reporting problems so it is hit or miss if the hanshake will work cleanly. Keep in mind that you will also lose any recordings on your old DVR as there is currently no way to transfer content to the new DVR.

BTW - my old 6416 never had a hiccup with HDMI and IMG 1.6. Only had problems when they swapped to the newer one for a problem I was having (which it didn't solve - sigh).

mike_b1

I started getting the du1 error after the upgrade to 1.7. it is annoying and I too will not go to component cables. If this can't get resolved, I will find another vendor for my TV service.

matcarl

It's not an error, it's a handshake verification. You didn't say if your HDMI is working, all you say is you get that code for 1 second which means nothing to the consumer.

psu319

Matcarl -

Not sure if you were referring to me or not but since I was the OP, I'll answer.

Yes, it is an error. When I get the "du1" code my screen goes black and stays that way. I either have to (a) change the channel, if I am able or (b) turn the TV off and then back on again...sometimes multiple times until the TV will go back to "normal".

My husband has since "fixed" our issue...I'm not sure how and since I'm not the techie here I won't even venture a guess. I know that it wasn't the way he wanted to, and quite frankly, we expected more out of Verizon.

NYC-Guy

On an older Motorola DVR I used to have you would see the DVI code light up on the box for a few seconds when you first turned it on and before the picture appeared on the screen. The handshake was ok after that. I recommend that you request a replacement box and don't let them **bleep** you that it is the HDMI cable you are using.

vohana

After the update I noticed that I would lose sound when switching back and forth between channels (watching two shows at once - checking scores). I am losing sound on one channel that I switch to and two channels on either side of it. The other channel remains fine along with the rest. It will resets if I switch through my hdmi inputs or turn the box completely off it will also reset.

VERY ANNOYING! Why sell something if it doesn't work. What am I paying for?

Refuse to go to component cables as per Verizon customer service. They said they have no schedule for a fix. They said it is a "known" problem with a few models of TV's...Like Samsung, Vizio and others. Only some of the most popular ones! I have switched boxes from my DVR to regular HD box and it still happens.

I get the DUI flash when I switch inputs or turn on the box. Don't remember that before a month ago (March 5).

Good luck all!

spacedebris

@vohana wrote:
After the update I noticed that I would lose sound when switching back and forth between channels (watching two shows at once - checking scores). I am losing sound on one channel that I switch to and two channels on either side of it. The other channel remains fine along with the rest. It will resets if I switch through my hdmi inputs or turn the box completely off it will also reset.
VERY ANNOYING! Why sell something if it doesn't work. What am I paying for?
Refuse to go to component cables as per Verizon customer service. They said they have no schedule for a fix. They said it is a "known" problem with a few models of TV's...Like Samsung, Vizio and others. Only some of the most popular ones! I have switched boxes from my DVR to regular HD box and it still happens.
I get the DUI flash when I switch inputs or turn on the box. Don't remember that before a month ago (March 5).
Good luck all!

Yes they have had issues with HDMI for a few years now. Everytime they fix some they break others. The ONLY solution is to switch to component cables. Personally I dont understand why so many people are dead set against using component cables. There is NO differnce in quality as far as the picture is concerned. Both HDMI and Component can carry the 1080i signal (most HD is in 720 anyway right now). The only difference between the two types of cable is that the HDMI can carry 1080p signal. No channel broadcasts in 1080p and Verizon doesnt carry the 1080p so therefore there is no need for the HDMI. The only reason that I see is if you have visible connections, the HDMI is 1 cable, where as the component are 5 cables. But other than that, there is no difference. And Verizon is not selling HDMI. That is not part of their service. They offer HD programming and the equipment to do so. Their systems are capible of giving you everything you pay for so they are meeting their obligations. Granted it would be nice if their systems could give you HDMI as well, but from their prospective, they didnt provide you a TV, they just provide the motorola box. The motorola box is not compatible with your TV's HDMI system, but it will work fine with Component cables (that verizon will provide free of charge). They are doing what they can. They will never get the HDMI to work with everyone, until ALL companies (TV manufactures, Broadcasters, Cable companies, and All the manufactures that make HDMI components) all agree on a standardized format for HDMI. The problem right now is that not all devices speak the same HDMI "language".

matcarl

@spacedebris wrote:
Both HDMI and Component can carry the 1080i signal (most HD is in 720 anyway right now). The only difference between the two types of cable is that the HDMI can carry 1080p signal.
Correction: Most HD channels are in 1080i

spacedebris

but most HD programs are in 720

Now your right that most channels will broadcast in 1080i so if the program is in 1080 it will go out in 1080. And you will be even more correct in the not to distant future. But right now, programs in 720 still outnumber the programs in 1080 nearly 2 to 1 (but that number is dropping constantly Smiley Wink )

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