Question about Hitachi 50SBX70B 50" Rear Projection Television

1 Answer

Intermittent video dim video usually on turn on then gets normal after a few minutes,but then goes dim again on channel change. ,

Posted by on

  • John Leonard Feb 13, 2008

    the crt's are very dim when the video is dim, and very bright when video is normal

  • John Leonard Feb 13, 2008

    could you give me the comb filter removable board location or board number thank you



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert who has answered 200 questions.


    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 206 Answers

There is a problem with a video processing board on this set, to repair this usaly means replacing up to 30 capacitors on this board and they are all surface mounted a very fragile, bust bet on this one is to take it in to the shop

Posted on Feb 13, 2008

  • Mike Owens
    Mike Owens Feb 13, 2008

    Yep ..... All video signal run thru what is called the 3YD/C Comb filter, this is a removable and most the times a repairable board, it sits on the signal board, however the ability to remove and replace all the defective capacitor usaly fall way beyond the scope of the backyard Tv repair guy. And being as I see this set is now 11 years old if it gets messed up you most likly will not be able to find a replacment



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Why does upper half of screen go dark? Watch the video. Also be advised that plasma sets are getting very hard to find parts for.

Feb 01, 2016 | Samsung HP-S5053 50 In. Plasma HDTV

1 Answer

Why does screen go black after a few seconds

Hope this helps.... Your monitor has an inverter issue. You know it's an inverter problem when:
1. Your monitor starts normally and displays the startup/desktop screen for a while.
2. Then it suddenly goes off, leaving a blank (black) screen or a very dim display.

To fix this black screen problem, change the inverter board (based on your monitor brand).

May 05, 2014 | ASUS VK193D LCD Monitor 19-inch - Black

1 Answer

Flashing inst cluster


Apr 25, 2013 | 2004 Lincoln Town Car

1 Answer

Video turn off and audio works fine

There could be several things going on. I would seriously recommend you get a diagnoses on the set. But the first thing I would do is when the video goes away, dim the lights in the room and shine a bright light on the panel. If you see a faint image on the screen, you have a back light circuit fault. If you see nothing while shining the light on the panel, you have a fault in your video circuit which could be due to overheating on main board or t-con. Again with so many possibilities at hand, I would get a professional diagnoses.

Nov 24, 2012 | Televison & Video

1 Answer

Intermittant heating.It will begin to glow....sometimes the flames shoot out for a short time....but then go out. Then, it will continue to glow red without flames igniting,then goes dim....couple minutes...

This is usually caused by faulty coils on the heat valve. they can be purchased seperate from the gas valve and are relatively easy to install..

Oct 27, 2010 | Dryers

1 Answer

VIDEO PROBLEM SAMSUNG LN46A630 I have a SAMSUNG LN46A630, after turn on the TV around two hours the screen goes black - the video disappear, some time the video come again the sound doesn't go, you can...

The Tuner signal board have intermittent problems.Tries websites like, to by a refurbish Tuner signal board for the replacement.

Oct 16, 2010 | Samsung LN46A630 LCD TV

1 Answer

Asus Monitor boes blank and comes back after power recycle

1. You can see images on the screen for a few minutes. That means there is nothing wrong with your computer.

2. When your screen goes blank, if you disconnect and then reconnect the monitor, it shows fine again for a few minutes before going blank (or dim) again. That means the problem is not with you video card.

3. It always shows the image after reconnection for exactly a few minutes before going blank again. yes? this means that there is nothing wrong with your cable.

Conclusion: Sorry, but you do not have many options. I bleieve that the problem is with your monitor that's going bad. Its far cheaper to get it replaced than to repair it.

Oct 04, 2009 | ASUS MW221U LCD Monitor

1 Answer

My Dell Inspiron 1521 keeps going dim every few minutes

This is usually an inverter or lamp issue both of which you could do yourself if you felt comfortable delving inside your laptop.

It is not usually an expensive repair and parts are available from a large variety of sources but EBAY is a good bet.

If you don't feel comfortable then a good local tech shop will be able to handle it.

Either way If one of those components is failing it is usually better to replace BOTH as they are connected.

If you found this useul pleae click

Aug 15, 2009 | Dell Computers & Internet

1 Answer

Power Brightness dims after using Kinoma Player

Ok i think i can help,

Step 1: Go to preferences
Step 2: Go to power
Step 3: Change the Auto-off after: feature and increase it to 3 minutes, the maximum.

I know this will only help it a lil from the 1 minute you had before, but if you pres the volume button or something within the 3 minutes it will restart the 3 minutes.

Sheeraz Khan

Jan 02, 2008 | Palm Treo 755p Smartphone

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

58 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Televison & Video Experts

Jaime Hernandez

Level 3 Expert

2336 Answers

The Knight
The Knight

Level 3 Expert

75767 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a Hitachi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides