Question about Flat Panel Televisions

2 Answers

Half part is display

Sir, half of the picture discribe on display (bottam)vertical ic (LA7840)ok.sub capasitors in vertical section.when i put the memory ic(24C16) then picture discribe top part of the picture in buttom.then i open the srvice manual(OK button from tv front panel&OK button on remote press 6 sec manualopen)All paraentalls r OK.But picture total not to display.Pls give solution. prossaser ic no:TDA9381PS/N2/310955 {21" colour tv LG goldeneye model no:RF21FC80E

Posted by on

2 Answers

Re: Half part is display - Flat Panel Televisions

Replace ic

Posted on Sep 29, 2008

Re: Half part is display - Flat Panel Televisions

Abl problem

Posted on Aug 01, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Onida tv

Horizontal line on screen denotes the absensce of vertical sweep itself. Check the vertical output section circuit to LA7840. Check for any loose solder terminals. It will be best to measure the input voltage to that IC from the LOT secondary supply. Try by replace the IC. If these do not help you, measure the frequency from the main IC. It should be at 50Hz. If this frequency is not present, the main IC is faulty. If you wish to get some more details about the circuit, check this link. Pull up older posts there, either by its left side bar, or see it in Timslide option. Schematic diagrams, that show vertical IC LA7840 is given. You can compare it.

Jun 23, 2013 | Flat Panel Televisions

1 Answer

Monitor displays half screen sometimes and goes back to full screen later. Some days you get the full screen but today it is half screen one time and then full screen another time. It finally quit...

The monitor have problem in vertical section of the board.Maybe the vertical output or any parts around the vertical ic is loose connection circuit,what we called,cold solder so its better to resolder the board at the vertical section.

Jul 11, 2011 | NEC PlasmaSync 61MP1 61 in. Television

1 Answer

Half the screen on my 42" Flat Screen LCD TV is blue. The other half is ok. How do I solve the problem?

The problem of you television is in the vertical section of the board.Maybe it have deffective or leak capacitor in vertical section of the board.Thats why it is needed for repair and troubleshoot by the authorized TV technician.

Jul 11, 2011 | Flat Panel Televisions

1 Answer

Hi I have a Philips 36PW9525/05 CRT TV. The sound is fine but the top half of the screen is not visable the bottom half seems fine. Can you advise on a fix??

hello sir i already encounter that problem..first remove the cover of your unit then you go to the vertical section of CRT driver when you see the I C that stand vertically it means that section is vertical then if found that section you have to do now is look for leak/bulged top capacitor near the vertical I C then replace with the same value/rate thank you sir

Mar 05, 2011 | Flat Panel Televisions

4 Answers

My LG TV Model 21FD2RG-AX have problem vertical failure its IC TDA 9340PS/N3/A/1923 vertical out put section ok

replace the vertical ic or check waveform of input signal to the vertical ic from processor, if these all are OK, check the deflection yoke continuity and replace if there have problem

Oct 17, 2010 | LG Flat Panel Televisions

1 Answer

Horizontal line in middle of the tube.. LA7840 vertical ic

Possible that the vertical drive IC has failed . But make sure to test the voltage on the IC as if the voltage is not present on the IC thenthe saem problem can happen andit can be due to a failure of the fusible resistor from the LOT.
So check this before you replace the IC.

Sep 24, 2010 | Flat Panel Televisions

1 Answer

Vertical rainboow lines on the left half of the screen

its likely that the lower y-drive panel has died.this is a very common problem with this model.the easy way is to remove the panel from the set completely,power it up and you should be greeted with the top half of the picture.this means ic failure,usually the bottom one for some odd reason.not replaceable unless you have the gear,these ics are available from dalbani(nikkai)for those extra careful with the four ribbon cables when removing/refitting.damage to these writes off the display panel.

Aug 31, 2009 | LG DU-42PX12XC 42 in. Plasma HDTV

1 Answer

Vizio sp42a

your tv is having a problem of more than one component .to get rid of the problem u should rectify your vif horizontal and vertical sections

Sep 24, 2008 | Vizio P2 42 in. HD-Ready Plasma Television

1 Answer

Half screen activated only

When only a half screen is produced, it is usually a upper or lower buffer board, if the top half is blank then it is the upper buffer, and of course if it's the bottom half then it's the bottom buffer board

Sep 15, 2006 | Panasonic TH-42XVS30U 42 in. Plasma HDTV

Not finding what you are looking for?
Flat Panel Televisions Logo

Related Topics:

638 people viewed this question

Ask a Question

Usually answered in minutes!

Top Flat Panel Televisions Experts

The Knight
The Knight

Level 3 Expert

66685 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Jaime Hernandez

Level 3 Expert

2267 Answers

Are you a Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides