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The tube has no picture at the bottom of the screen

The tube has about 5 inches of no picture but the rest of the picture is fine when I tap the main pcb heat =sink, it gets a little better please help!!!

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  • 179 Answers

Dear Robert,

Maybe you have a cold solder joint in your TV set in the vertical deflection circuit. Check for loose components or bad solder spot in that area. Also check the vertical size trimpot that may be dirty or with a rusted cursor(use contact cleaner spray to clean it and rotate a bit its cursor from one side to the other and see if you have the image increasing its size again.

Hope it helps!

Best regards,


Miguel Luiz Martins

Posted on Nov 29, 2013

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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MikeNJ1964
  • 398 Answers

SOURCE: Sound but no picture

A white like across the screen means that the vertical circuit has stopped working. Look for a small fuse that looks like a resistor near the vertical output IC, replace that fuse if open and resolder the pins on the vertical output IC.

Posted on Jul 08, 2007

SOURCE: Toshiba 35 inch picture tube problem

HELOO THE SET IS HAVINGA VERTICAL FAILURE ,REPLACE THE CONDENSERS AND ANY BURN PARST IN VERTICAL SECTION.AND AT LAST REPLACE VERTICAL IC IT WILL BE OKKK.

Posted on May 22, 2008

Slinteriors
  • 8617 Answers

SOURCE: sony 32 inch crt tv

On the neck of the picture tube you will see the large yoke. Loosen the srew slightly and just rotate the yoke assembly very little counterclockwise. That should correct your problem.

Posted on Oct 13, 2008

  • 1 Answer

SOURCE: The picture is failing gradually. Reduced viewing area

dumped it.

Posted on Mar 22, 2009

johnnydiode
  • 647 Answers

SOURCE: Toshiba 36A50 TV Picture Failure. When turning on

This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical. Be sure to vote/rate me if this helped Thanks!

Posted on Oct 19, 2009

Testimonial: "Thanks for your sage advise. I will get it repaired."

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I have a series of colored lines on the right 3 inches of the picture. Lines are vertical(top to bottom).The rest of the picture is fine.There is no picture only lines on the right 3 inches of screen.


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

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5 inch wide blue vertical stripe on lcd


It can be but rarely the main board, most of these sets have either one or two boards that drive the image on the screen, different names like T-con or Y out etc. the right side board could be the problem or a bad connector or ribbon cable for that side of the screen unit.

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Samsung TSL2793HF - Slight Right Side Pincushion and Horz Line Bottom to Top Until the TV Warms up


Yes, this is rare but I have seen it before--not fixable if it is what I think it is----It is what is called a Dome effect---the shadow mask in the picture tube is actually contracting and or expanding depending on temperature---

Directly behind the phosphor coating (the stripes that you see on the screen) is a metal screen--the holes or perforations in it line up with the stripes on the phosphor screen.

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Need help with my i9 phone


MMS Messaging:
1.) From the main screen tap the SMS Text icon.
2.) Tap MMS on the Messages menu.
3.) Tap MMS settings on the MMS menu.
4.) Tap Server profile on the MMS settings menu.
5.) Tap either SIM1 or SIM2 on the MMS settings menu, whichever SIM you are setting up
at this time for MMS messaging.
6.) Scroll down the list until you come to Profile 8. You can use any profile if need be, but
profile 8 is usually the first not already filled.
7.) Tap on Profile 8. Tap Edit profile.
8.) Tap just below Rename profile, then tap on the Edit button at the bottom of the screen.
9.) Clear the current text, then tap in the following text between the quotes
“T-Mo MMS”
Tap the Options button at the bottom of the screen.
Tap the Done button.
10.) Tap the area below Homepage, then tap on the Edit button at the
bottom of the screen.
11.) Clear the current text except for “HTTP://”, then tap in the
following text between the quotes after the HTTP://
“216.155.174.84/servlets/mms”
Tap the Options button at the bottom of the screen.
Tap the Done button.
12.) Tap the area below Data account, then tap Select at the bottom of
the screen.
13.) Tap GPRS on the Data account menu.
14.) Scroll down the list until you come to T-Mo MMS, the data account
set up under the Data Account Services section. Tap on T-Mo MMS
to select it.
15.) Tap the area below Connection type, then tap Select at the bottom of
the screen.
16.) Tap on HTTP, then tap on OK at the bottom of the screen.
17.) Tap the area below Proxy address, use the numeric keyboard at the
bottom of the screen to tap in the following numbers,
“216155165050”. The result should look like 216.155.165.050 under
Proxy address.
18.) Tap the area below Proxy port, use the numeric
keyboard again to tap in the following numbers
“8080” to replace the current 0 value. Then tap OK.
19.) The areas under both User name & Password should
remain BLANK. If they are not blank, select each,
and Edit them by clearing all text.
20.) Next tap the Done button at the bottom of the screen.
21.) A Save? question box should pop up. Tap the Yes
button at the bottom of the screen.
22.) Tap the Activate profile button on the T-Mo MMS menu screen, and you should be
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You are done setting up MMS messaging for T-Mobile. You can continue to tap the Back
button on the bottom of the screen until you exit out of all the menus to the main screen, or
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Internet Access:
If all you want to use for internet surfing is the phone’s built-in browser, and you have set up
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internet by simply tapping on Service from the main menu. Then tapping on WAP and using
the various options to navigate the internet like Homepage, Input address, etc. However, this
won’t provide as robust an internet experience as a Java based internet program such as Opera
Mini 3.1 or 4.1, or another java based internet browser. If you do decide to install a Java
program for browsing the internet, there is one more setting which must be changed prior to
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Java Internet Settings:
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2.) Tap Java settings from the Java menu.
3.) Scroll down and tap the area just below Java SIM1 (SIM2) profile,
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4.) Use the arrows to scroll the setting until T-Zones appears in the
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5.) Tap the OK button at the bottom of the screen.
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1 Answer

Mitsubishi VS-60705 Large Screen Projection


thanks for your detailed description of what happened.
replacing the vertical output i.c will correct the problem.
the reason it failed was bad connections on it.

Apr 22, 2008 | Mitsubishi VS-45605 50" Rear Projection...

1 Answer

FADING TO BLUE SCREEN


Sounds like you have a problem with the blue gun in your picture tube or its drive circuit. You might remove the back cover and gently tap on the neck of the picture tube using a plastic screwdriver handle while watching the screen in a mirrow. If the picture flashes back on or on and off then the picture tube is the problem. If this is a projection tv you have three separate tubes : red, green & blue. you'd need to tap the blut one.Gently!!!! Stargazer

Feb 13, 2007 | Sony KP-53HS20 TV

1 Answer

KEEP FADING TO BRIGHT BLUE SCREEN


I'm about 90% sure it is the blue picture tube developing an intermittent heater to cathode short. I'm surprised the set isn't shutting down shortly after this happens. A service call will tell you for sure as it could also be a bad solder connection causing a similar symptom. My own procedure to check it out would be to GENTLY tap the neck of the suspected picture tube with a screwdriver handle to see if I could get it to come and go (Or get out my CRT tester and measure it with the power off). Obviously by holding the screwdriver blade you don't want to accidently short anything out as there is about 33,000 volts a few inches away from where I would be tapping. Nuff Said.

Feb 11, 2007 | Sony KP-53HS20 TV

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