Question about Apex Digital GB5108 51" Rear Projection EDTV-Ready Television

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Three colored lines across the middle...

I have a Apex GB5108 that has nothing but the three colored lines across the middle of the screen. The set does not have sound and the control buttons dont work (except the menu). I'm no expert but it seems like it must be a power supply problem? Any advice would be greatly appreciated!

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Re: Three colored lines across the middle...

Sounds like the vertical control IC has gone out. Replace IC N301 (TDA8351) and check or replace R370 (1ohm), R371(33ohm), and R380(1ohm). This shouldn't affect the sound but once you get video you might figure out what is wrong with the sound (control setting). The TDA8351 crosses to NTE7156 and shouldn't run you more than $10.

Posted on Sep 30, 2007

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Come up 3d how to change

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find a fix here

Mar 06, 2010 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Hello, I have an Apex GB5108 and it has a horizontal colored line going through the middle. What component could be bad and needing replacing? Thanks Tom

I am not familiar with this particular set, but it sounds like you have no vertical deflection, which would mean your vertical output IC may be bad. The # on those ICs usually start with LA and is mounted to a heatsink.

Jul 30, 2009 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Picture reduces to about 2 in across middle of screen

Probably theelectrolytic caps around the vertical are failing or there are some bad solder joints in that are. See if tapping around the area restores the pic, if so resolder until it is better.

Apr 14, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Convergence IC's

Lines going across is a little vague but there is always the problem with the electrolytics (caps) around the vertical, be sure and get the one on the power supply too. Just change all you can find(usually 4-5). Thre are 2 convergence ic's if you didn't change them both, resolder the other one.
Then check the value on R519 for me.

Apr 09, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Colored lines in middle screen , from side to side

Not much of a description but it may be a convergence problem, these sets had lousy soldering on the convergence chips, un fortunately, if it goes long enough it will require chips and in my case , a resistor I cannot read the value of.

Mar 01, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

51 big screen apex tv, convergence or verticle IC?

If the lines are thin and close together running horizontally, it may be the vertical driver, but that usually takes out the resistor and sometimes the diode in the B+ for the vert. Also you must replace the caps that caused the problem in the first place.

Feb 05, 2008 | Apex Digital GB5108 51" Rear Projection...

1 Answer

Apex 43 inch tv

Convergence is when you aim all three of the projectors, your tv has three, so that the images they produce all line up with each other. This usually doesn't generate a white line across the middle of the screen though, there is a button on the front panel of your set that automatically converges the three projectors, you can try using that.

Nov 06, 2007 | Apex Digital GB4308 43" Rear Projection...

7 Answers

Apex GB5108 Convergence and screen issues


Dec 20, 2006 | Apex Digital GB5108 51" Rear Projection...

1 Answer

APEX TV problems

need flyback transformer #030531-5283

Nov 05, 2006 | Apex Digital GB5108 51" Rear Projection...

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