How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask TV Tech1 Your Own Question

TV Tech1
TV Tech1, Technician
Category: TV
Satisfied Customers: 5236
Experience:  30 Years experience. Authorized Warranty servicer.
26807325
Type Your TV Question Here...
TV Tech1 is online now
A new question is answered every 9 seconds

My cable tv doesnt work, just blue screen on my mitsubishi

Customer Question

My cable tv doesn't work, just blue screen on my mitsubishi projection tv. It worked before I temporarily plugged another tv into the HDMI output on the cable box. If I run my dvd player through the same compartment inputs on mits tv it works fine. If I run the cable compartment jacks through another tv that tv works fine? Im kind of at a loss as what to do next since it worked before I did this.
Submitted: 4 years ago.
Category: TV
Expert:  TV Tech1 replied 4 years ago.

Sounds like the Cable box's EDID isn't being verified. I can only suggest powering down both the box, and the TV set, removing the power cord on both for 5 minutes, then plugging it back in again and turning both back on. The EDID (Electronic Digital ID) may be recognized again and the Cable box will then send it's signal over to the TV set.

 

EDID is designed to protect against piracy of signal, and it sounds like when you changed TV sets the EDID changed, and now it's blocking the signal when you changed it back to the Mitsubishi.

 

A temporary workaround is to connect your Mits to the Cable box with COMPONENT cables, until this issue is resolved.

 

 

Customer: replied 4 years ago.
I tried unplugging both the box and the tv for 5 minutes no luck with that fix. I wasn't clear I guess in my letter but the Mits doesnt work with the component cables just get the blue screen the dvd works on any of the comp. or DTV imputs. Can the cable company reset the EDID for me? I talked to them the other day they didn't say anything about that to me, just had me check the connection at the tv and box and recycle the box.
Expert:  TV Tech1 replied 4 years ago.

Cable box MUST use the COMPONENT DTV input only !

 

The DVD can use any other component input.

 

Both should work correctly then. Cable company can reset their box.

Customer: replied 4 years ago.
I'm going to take the cable box by the cable office and exchange it for another today to see if that will work will that be like an EDID reset? Right now the cable isn't working on any imput.
Expert:  TV Tech1 replied 4 years ago.

Okay, just remember your Cable box must connect to the DTV component inputs on your TV set, because that input is actually 1080i and the ones NOT labled as DTV are only 480i/p input jacks.

 

DVD players do 480 with the component outputs, so they will work on ALL of the component inputs, including the DTV input.

 

Back when your TV was built by the manufacturer, they only put one HD Component connection on TV sets, and Mitsubishi labled the HD jack as DTV.

 

Today's cable boxes are all 1080/720 output, so they must use the DTV jack

 

But, you do want to use the HDMI input I'm sure. The problem with that is CABLE boxes just don't work reliably with it, especially if the Cable box is the MOTOROLA brand.

I've seen some Scientific Atlanta boxes do the same thing, so I have been telling customers to use the Component inputs for the cable box and use the HDMI for the Blu Ray players as they are more reliable with it.

 

There was also a series of Mitsubishi TV sets, where the DTV component inputs could be switched from YPbPr signal to an RGB computer-based signal too....if it was set for RGB you had a crummy picture with no sync, or it was green picture. If that's what you get with the Component connection, let me know that ok?

It was the hardest thing to find in their menu, but it could be on your TV set, as it's pretty close to the time they were doing that.

 

Now, the whole point about the EDID is the fact that the TV was built years ago, and the newer boxes have newer EDIDs and it may be the cause of your problem too....New equipment on older TV sets may just have to use the COMPONENT input as a backup input in your situation.

 

In fact, LG just created a brand new TV set that if you have HDMI problems, the service tech can actually go into the service menu, erase the OLD EDID and have it Re-Learn it !

I just saw one a couple weeks ago. Now that's SMART of them.

 

But nobody else has it yet.....

 

 

Customer: replied 4 years ago.
Got the new cable box same thing blue screen no change they said in the cable office its a an input problem on my end not likely the box looks like they are right. So I guess that eliminates the EDID right? I found the switch from YPbPr signal to an RGB its set on YPbPr so thats not it. I went through every menu I can find on the tv set nothing changes it.
Customer: replied 4 years ago.
I hooked the cable to the tv with the coax skipping the cable box its not a great picture but it works that way? I don't understand why everything works but the but the DTV?
Expert:  TV Tech1 replied 4 years ago.

Ok, so let's make sure we are on the RIGHT PAGE before we go ordering parts.

 

Ok, so we are dealing with a BAD HD Component path, the inputs are correctly set for Y PB PR, and your Cable box outputs 1080i....or 720P.

 

Your 480 DVD works on the DTV but not the 1080....

 

And the only part that would lock out the signal is....IC2V00

 

Ok, you see the big rectangular box in the middle of this picture?

 

graphic

 

That's IC2V00, and the pins are wrapped around it the same way, and it's MUCH smaller, about the size of a postage stamp.

 

Special tools required to remove and replace, real pain to work on, even for techs with the right tools.

 

So we can't work on it that way....

 

Here is the Signal board part number, Cost is $360.00 for it.

 

930B881001

 

You may have to pull it out and send it to MODUS LINK to get it fixed, or order it directly.

 

http://www.moduslinkptstvboards.com/Search.aspx?k=930B881001

 

If you have any more questions, just ask.

 

If you are finished, please press the ACCEPT button.

 

Thank you.

 

 

 

 

 

 

 

 

 



Edited by TV Tech1 on 2/17/2010 at 12:41 AM EST

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
< Last | Next >
  • I'm screaming your praises!! WOW! I plugged my TV in and bammo! The picture came on bright and beautiful. What a relief! YOU saved me some money and headache. VM United States
  • I love this site! $9 instead of a repairman or new/used frig can't be beaten. This older woman will worry less now that she knows about this site. Bless you all. Windy USA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
 
 
 

Meet The Experts:

 
 
 
  • TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TV/TVTech1/2013-3-25_625_TECH1Nobanner.64x64.jpg TV Tech1's Avatar

    TV Tech1

    Technician

    Satisfied Customers:

    4800
    30 Years experience. Authorized Warranty servicer.
  • http://ww2.justanswer.com/uploads/OR/OriginalSeadog/2011-7-22_191917_ProfilePicture.64x64.jpg Rod's Avatar

    Rod

    TV & Communications Sys Repair

    Satisfied Customers:

    2354
    FCC Commercial License, Previous owner of Electronics Repair shop, 40+ years in electronic systems.
  • http://ww2.justanswer.com/uploads/benimur/2009-03-29_003401_id_2.jpg Louie's Avatar

    Louie

    Technician

    Satisfied Customers:

    2208
    25+ yrs. experience in the field and 3+ yrs. online, down to component level.
  • http://ww2.justanswer.com/uploads/P0/p0llinate/2011-4-27_174649_tucker.64x64.JPG Nathan's Avatar

    Nathan

    Installer

    Satisfied Customers:

    1683
    Custom home theater installer, authorized dealer top brands.
  • http://ww2.justanswer.com/uploads/ST/steven.benoit/2011-4-1_194735_untitled1.64x64.jpg Steven's Avatar

    Steven

    Technician

    Satisfied Customers:

    1366
    Ma. Master Technician Lic. Authorized Warranty Support.
  • http://ww2.justanswer.com/uploads/IT/ITPeter/2011-5-3_23187_Pete.64x64.JPG Pete's Avatar

    Pete

    Electronic Engineer

    Satisfied Customers:

    1260
    12+ years experience installing and repairing electronics.
  • http://ww2.justanswer.com/uploads/3G/3guk/2011-1-15_132320_D1SC01363.64x64.jpg James's Avatar

    James

    Technician

    Satisfied Customers:

    1154
    AV Service Engineer (4 Years)
 
 
 
Chat Now With A TV Technician
TV Tech1
TV Tech1
4814 Satisfied Customers
30 Years experience. Authorized Warranty servicer.