Mitsubishi HC4000. HDMI problem. Vertical checkerboard line - AVS Forum
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post #1 of 27 Old 08-26-2012, 06:10 AM - Thread Starter
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Hello!
I have a problem with the projector HC4000, with hdmi connection. With cable length above of 1.5 meters the noises appear on the picture.
It's known as "Vertical checker-board line." http://www.avsforum.com/t/1331261/official-mitsubishi-hc4000-only-thread/60. My problem is the same.
And another problem. I live in a place where there is no representation of Mitsubishi.
Anybody know is there solution to this problem without going to service? Firmware update for example or another.
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post #2 of 27 Old 08-26-2012, 06:34 AM
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Did you just buy a refurb unit? I just bought one, set mine up and had the exact same problem. Mine did it even with no HDMI cable, and still did it with the crosshatch pattern. I sent it back for repair. The lines would appear after the projector was running for about an hour or so. No matter what I tried nothing would cure the problem, even tried switching cables.

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post #3 of 27 Old 08-26-2012, 02:46 PM - Thread Starter
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Quote:
Originally Posted by kenny2428 View Post

Did you just buy a refurb unit? I just bought one, set mine up and had the exact same problem. Mine did it even with no HDMI cable, and still did it with the crosshatch pattern. I sent it back for repair. The lines would appear after the projector was running for about an hour or so. No matter what I tried nothing would cure the problem, even tried switching cables.

I bought it on Ebay. The seller called it a factory-demo unit, fully working, looks like new, with a lamp less than 100 hours. I just got it and can still return the seller.
Today I bought an expensive cable 5 m, named H-PRO, the projector worked for about an hour, and does not produce anything about what I said earlier. Tomorrow I will drive it even a few hours to be sure.

What is the date of production of your projector?
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post #4 of 27 Old 08-27-2012, 03:20 PM - Thread Starter
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Today I route the cable through the wall. Tried to run a projector, but 1080p is no longer supported. Possible of options on my Seagate Theater+ player became available only 720p and 1080i. It is strange, yesterday everything was OK.
Then I decided to move a little bit hdmi plug, the one that is connected to the projector. I have it installed on the ceiling. Connector is pulled down, player rebooted. And 1080p became available again.
My conclusion is that a bad contact in the connection. Or is it a defective socket on the projector or the unsoldered socket leg(s) on the motherboard.
After all the PJ worked for about 5 hours w/o any problems!
I recommend to try it.
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post #5 of 27 Old 08-28-2012, 06:09 AM
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Quote:
Originally Posted by asdf79 View Post

Today I route the cable through the wall. Tried to run a projector, but 1080p is no longer supported. Possible of options on my Seagate Theater+ player became available only 720p and 1080i. It is strange, yesterday everything was OK.
Then I decided to move a little bit hdmi plug, the one that is connected to the projector. I have it installed on the ceiling. Connector is pulled down, player rebooted. And 1080p became available again.
My conclusion is that a bad contact in the connection. Or is it a defective socket on the projector or the unsoldered socket leg(s) on the motherboard.
After all the PJ worked for about 5 hours w/o any problems!
I recommend to try it.

Interesting, never thought to try that. Oh well, I'm sure the tech guys will figure it all out. Please post back if the issue reappears.

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post #6 of 27 Old 08-28-2012, 02:27 PM
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I had a HC3800 last year but needed to return it 2x to get it fixed. The pj worked fine for a few hours but similar problem returned. After 2x, I sold it on eBay for a loss and just did not want to deal w/ it.

However, I heard the hc4000 was better built.
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post #7 of 27 Old 08-29-2012, 12:22 AM - Thread Starter
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I will report further if the problem happens again.
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post #8 of 27 Old 08-30-2012, 12:14 PM
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Quote:
Originally Posted by asdf79 View Post

I will report further if the problem happens again.

What kind of HDMI cable are you using?

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post #9 of 27 Old 08-30-2012, 12:51 PM - Thread Starter
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sorry
but the problem is not in the cable and the connector. Line again appeared, this time with the component input.
service center told to change the motherboard entirely
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post #10 of 27 Old 08-31-2012, 06:55 AM
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Quote:
Originally Posted by asdf79 View Post

sorry
but the problem is not in the cable and the connector. Line again appeared, this time with the component input.
service center told to change the motherboard entirely

Man that sucks. The tech had my projector running for about 2 days now and the issue hasn't reappeared. Lol just my luck.

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post #11 of 27 Old 08-31-2012, 07:09 AM
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Did you send a pic to them? My tech said if he doesn't see the problem, then they can't replace anything based on speculation, although I did send in a picture.

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post #12 of 27 Old 09-01-2012, 02:19 PM - Thread Starter
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Here is the video with my problem http://www.youtube.com/watch?v=LVoOVlClQ2s
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post #13 of 27 Old 09-07-2012, 05:49 PM
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Well I got my projector back today, still has the problem! Getting my money back on this one. Whats weird is while in repair they couldn't replicate the problem. 15 minutes after switching the projector on, checkerboard lines appear, even with HDMI cable unplugged. mad.gif

Btw, they had the projector running for 30+ hours in repair.

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post #14 of 27 Old 09-08-2012, 02:33 AM
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I know this might be a dumb question but have you pluged your projector into another outlet on a different breaker. Its possible a fridge or ac could be causing a sag in voltage causing your problems.

Smart enough to know better, to old to care
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post #15 of 27 Old 09-08-2012, 06:35 AM
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Quote:
Originally Posted by rekbones View Post

I know this might be a dumb question but have you pluged your projector into another outlet on a different breaker. Its possible a fridge or ac could be causing a sag in voltage causing your problems.

I did try it on a different outlet, and it lasted over an hour without the lines appearing. I have not tried it on a different breaker yet. Good idea!

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post #16 of 27 Old 09-08-2012, 01:23 PM - Thread Starter
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Wait a while.
I have a solution.
I got the manufacturer's recommendations for repair of the projector.
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post #17 of 27 Old 09-09-2012, 08:28 AM
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Quote:
Originally Posted by asdf79 View Post

Wait a while.
I have a solution.
I got the manufacturer's recommendations for repair of the projector.

Which is what?

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post #18 of 27 Old 09-09-2012, 11:40 AM - Thread Starter
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OK. Here are the manufacturer's recommendations for the solution of our problem.
In the service I just replaced the resistor R16 to 1,8 KOhm. Three days of testing the projector for a few hours a day - the problem disappeared.
Try it.
HC4000_VerticalBar-1.pdf 90k .pdf file
Attached Files
File Type: pdf HC4000_VerticalBar-1.pdf (90.1 KB, 85 views)
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post #19 of 27 Old 09-10-2012, 09:39 AM
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Quote:
Originally Posted by rekbones View Post

I know this might be a dumb question but have you pluged your projector into another outlet on a different breaker. Its possible a fridge or ac could be causing a sag in voltage causing your problems.

If voltage sag is the problem then why would people be sending there projectors in for repair?

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post #20 of 27 Old 09-10-2012, 02:20 PM - Thread Starter
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Quote:
Originally Posted by kenny2428 View Post

If voltage sag is the problem then why would people be sending there projectors in for repair?

What is the voltage you are using? 110 or 220 volts?
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post #21 of 27 Old 09-11-2012, 05:28 AM
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Running on 110 here.

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post #22 of 27 Old 09-12-2012, 07:30 AM
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Just an update, sending this thing in to Mitsubishi for repair. Should have done that the first time and not had sent it to projector people for repair, lol. They seemed clueless.

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post #23 of 27 Old 09-12-2012, 06:22 PM
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The problem is very rare on the Mits hc4000, but I have seen it happen. It is known as the checkerboard of death.

There were bad runs on older hc3800's that had this issue, but this was mostly fixed in the hc4000, but I guess a few got through unfixed. After the initial bad runs on the hc3800, the hc4000 actually has turned out to be one of the most reliable projectors in this forum. Compared to say the Epson 8350, even if 4x more Epsons were sold, we see 10x less problems on the Mits hc4000. As a matter of fact, this is about the third or fourth time in the year I've seen someone post a problem on the hc4000 (whereas it is about the 50th to 100th on the Epson 8350). That said, even though Epsons can be more problematic, they are still ok if you get a good one (not trying to dog Epson here, but just saying what I've seen).

So do not be discouraged, Mits should replace it and you'll be good to go.


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post #24 of 27 Old 09-12-2012, 08:02 PM
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Quote:
Originally Posted by coderguy View Post

The problem is very rare on the Mits hc4000, but I have seen it happen. It is known as the checkerboard of death.
There were bad runs on older hc3800's that had this issue, but this was mostly fixed in the hc4000, but I guess a few got through unfixed. After the initial bad runs on the hc3800, the hc4000 actually has turned out to be one of the most reliable projectors in this forum. Compared to say the Epson 8350, even if 4x more Epsons were sold, we see 10x less problems on the Mits hc4000. As a matter of fact, this is about the third or fourth time in the year I've seen someone post a problem on the hc4000 (whereas it is about the 50th to 100th on the Epson 8350). That said, even though Epsons can be more problematic, they are still ok if you get a good one (not trying to dog Epson here, but just saying what I've seen).
So do not be discouraged, Mits should replace it and you'll be good to go.

Thanks for the input Coderguy. Yeah, I have read the HC4000 thread and I had noticed how you always mentioned how reliable it is. I was very surprised when the issue popped up. And disappointed! But I'm sure they will fix the issue, I even sent them a picture of the problem. Can't wait to get it back!

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post #25 of 27 Old 09-15-2012, 04:52 PM
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I know from being an AVID user in the hc4000 thread, that the problem is almost non-existent these days, even though YES I had the problem. I did say I've seen the problem (as in with my own eyes on my own unit). I did not think that is much different than saying, yup I had the problem (the latter hinting that the problem is something to be concerned about, which I did not want to imply - see below).

Actually I had the problem on both the hc4000 and hc3800, but I also ordered them very early on right near when they both came out. It was the early runs that had the issues (but far more on the hc3800's), and they were corrected, and I did not have the issue on any of the replacements nor does anyone I know in the forums have the issue again on the hc4000 (I think I've seen it 5-6 times in 3 years now in thousands of posts on the hc4000 - more on the hc3800, that is just not enough to worry about it).

Apparently the problem is just a faulty resistor, and it is well known by Mits and well documented and already corrected. Anyone that has it somehow got an older run or one of the units that missed the corrected "almost recall". I do not talk about because it was corrected, just like I will no longer talk much about the Acer 9500bd's pixel mapping issue (not much point in bringing up fixed issues). Here also, a few people will occasionally get pre-fixed units and have old problems that are now easily corrected with a swap-out.


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post #26 of 27 Old 09-15-2012, 05:03 PM
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Rare yes, but I also ordered both models from the same Vendor early on who apparently was known to immediately stock 100+ units as soon as they were released. So that particular Vendor had the early batches. The Vendor was Provantage (a volume dealer of all kinds of electronics), and if you notice, they often do that with most items (you will see them carry 500 of one item whereas another vendor has 5). BTW, I do like Provantage just fine and this not a hit against them, it's just they tend to carry more stock of stuff then most places (it's just their biz model), so it might take them longer to flush stuff out then some places.

I just did not want people to think the problem is an actual issue, because it no longer is. Why are people still getting it, well like I said it is extremely rare, but some slipped through the cracks. Mits did a partial recall, holding back some stock from going forward until most were fixed, but some leaked out, and some vendors let them sell regardless of the partial recall (or whatever you want to call it).


Quick and Easy Shelf Mount Method for both one projector or dual stacks

Web Calculator v023 & v025
- Quick Peak at the new upcoming calculator
**Current Projector Calculator** -- http://www.eliteprojectorcalculator.com

Coder's Top Projector Picks of 2012 --http://www.avsforum.com/avs-vb/showthread....

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post #27 of 27 Old 09-26-2012, 08:40 AM
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Well, after I month of going around in circles with this projector, Mitsubishi sent me a replacement after I sent mine in. Apparently my mainboard was bad, and the part was on back order. I am happy with the outcome, Mitsubishi CS handled it very well. Also my replacement only has 100 hours on the bulb, and the body of the projector is flawless. Looks brand new. I watched it for 8 hours yesterday with no issues, this thing is a keeper! smile.gif

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