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Did not work. I changed in the service menu or tv model thinking it could improve the picture so the screen went black and I can't access anything that can make the return.

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Have to be very careful in the service menu, hard to help without the full model number.

Posted on Oct 22, 2019

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

SOURCE: BLACK SCREEN, AUDIO OK

I have samsung 40" LCD tv and it's happening the same thing. I turned it on and it last for 5 minutes and the screen went back but the audio is fine. I turned off and turned it back on it worked fine but an hour later it happen again.

Posted on Jan 16, 2008

Jim Krause

  • 1779 Answers

SOURCE: JVC LCD TV LT-42X688-powers on, blank screen. no picture,no sound

You most definately have bad capacitors in the power supply. try and get it repaired as soon as possible, not an expensive repair that iv'e seen.

Posted on Feb 04, 2009

Anonymous

  • 124 Answers

SOURCE: Samsung plasma all black screen

Black Screen come from three areas. 1- Power Supply Board 2- Inverter Board 3- Processing Board on the LCD. Since the Power Supply Board was replace, it easy to troubleshoot where the problem. lies If you cannot get the backlight, then its the inverter board. If you can use a flash light on the TV screen and can barely see the images, then the problem is indeed the inverter board. If you cannot see any images when using a flash light, then the problem comes from the LCD processing board. Let me know if you have any success. Mike

Posted on Feb 21, 2009

ginko

Ginko

  • 19396 Answers

SOURCE: Polaroid LCD TV TLA-4641C

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Posted on May 05, 2009

circuitworld

Circuit World

  • 335 Answers

SOURCE: screen went black/blank can hear sound no picture,

Your inverter circuits and/or power board need servicing.....

Either three fault scenarios are happening:

1. the inverter circuits are not producing AC ripple too the CCFL lamps that illuminate the LCD glass panel.

2. the power supply board is not feeding 24vdc - 12vdc sustain voltage too the inverter circuits. Meaning, no dc high voltage output from the power board.

3. The timing control circuit (LCD Board) has shorted switching devices or on-board memory has failed....which causes data/dc loss at the input which results in the inverters canceling load power (lamps). The sync data between inverter and LCD Board are absent. This will result in a 'NO LIGHT' condition on the LCD display.

Number 3 is a rare case, its usually #1 the inverters need servicing.....

Posted on Nov 10, 2009

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1 Answer

I have a Samsung TV, half of the screen was vaguely showing, I replaced tcon from eBay, I got more of an image on the screen but not fully, so I replaced the main board again from eBay. When I put that...


distorted screen is it settings are wrong, samsung have a special menu setting you use to set up tv parts. and you have to press them in order on the samsung remote to access the setting. changing parts around will alter the setting, as each board is set up for different model. the setting menu is different from model to model but the boards can be in array of models, do a search for you model and the service mode menu code. and use this to change the settings on the main board to setup tv. its like a bios on a computer.

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Hi ,

get the power supply checked and the screen back light too. if possible change the screen .
peace .

May 18, 2017 | Televison & Video

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The picture is oversized and the printing as in the stock ticker or in the sports scores can only be seen a little bit on the bottom. Can't find anyway to resize the picture.


Zenith sets, like most others now, are adjusted electronically through a service menu. You'll need your original remote control (or a Zenith-brand universal replacement with a MENU key) to access the menu. Press and hold the MENU button until the channel number and time display goes away, then press 9, 8 , 7, 6, ENTER. This puts you into service mode.

In service mode, CHANNEL UP and CHANNEL DOWN move through the different settings, and VOLUME UP and VOLUME DOWN change the values. Make sure you write down the original value of anything before you change it so you can put it back if necessary. One of the reasons the manufacturers hide the service menu is because the set can be damaged by incorrect settings to some of the parameters.

On some models, you can't get to all the parameters unless you change one called F MODE from 00 to 01. You might need to do this on yours.

The list of parameters varies by model and features. I haven't worked on a Zenith in a long time so I don't remember exactly what yours says, but you want to find two settings for V SIZE (vertical size) and V POS (vertical position). Adjust the size first by lowering the value until the top and bottom of the screen are black. Then adjust the position so the picture is centered (black strips close to equal size). Finally, increase the size until the picture fills the screen again. It's normal to adjust for a little overscan, meaning you push the top and bottom a little bit out of view. If you stop too soon, on some channels you might see flashing lines at the top of the picture.

When you're finished adjusting, turn the TV off to exit service mode. If you needed to change the F MODE setting, put it back to 00 first. Your picture should be properly sized after all this.

Mar 19, 2011 | Zenith SY2772DT TV

1 Answer

Sound stays on, but no picture- goes black and stays that way.


This unit should still be under warranty and should be taken in for warranty service. Any attempt to access the interior will void the warranty. It is important that a complete description of the problem like you entered here be taken along when you bring the set in for service. This will insure that the servicer be able to reproduce the problem and resolve it.

From your description (and as a servicer), I would be looking for a component that is heat sensitive. These types of problems are fairly easy to locate and resolve.

Please take this in for warranty service and update this when you find out the details.

Thanks,
Dan

May 04, 2010 | JVC LT-26C31 26 in. LCD Television

1 Answer

Was watching TV and the picture just went black (still had sound)


eithor the flyback just craped out or the tube went
try turning up the flyback failing that call a service tech and ask for a quote
quote cose 30-50 bucks
atleast you will know forsurre if it's worth fixing

Aug 06, 2009 | Samsung SPN4235 42 in. Plasma HDTV

2 Answers

19 inch curtis mathis tv


This is the closed captioning, even though it may not contain writing in the block. If you can access the main menu then you can try and turn the CC to off. Otherwise you are stuck with it.

Please rate this answer if it helped.

Feb 12, 2009 | Curtis-Mathis CM19011 TV

1 Answer

Screen is off centered


Every tv has a secret service menu accessed through a secret sequence of buttons on your non-secret remote.

With the power off, press this button sequence:

mute
1
8
2
power on

You should now be seeing the secret service menu.

TOUCH NOTHING IF YOU DON'T KNOW WHAT IT DOES!!!!!!!!!
Before you touch ANYTHING write down what the initial setting was. I mean it mister.
I think hitting volume down selects an option, while hitting "menu" takes you out of that option and into the area you were just in. There are lots of things to do here.

Before you do anything, go to the video options (there ought to be four of them), under one of them (second one I think) is the option to turn VM or SVM on or off (a setting of "zero" is off). For God's sake turn this off. I think it says "VM level" or something. Anything that says "VM" needs to be set to zero.

Now, to center the picture, I think you'll want the very top menu at the start of the service menu. One is horizontal something and the other is vertical something. BTW, it helps to have a test pattern for overscan when doing this. Do you own a copy of Digital Video Essentials? You should. Again, write down settings before you change them, so if you screw up you can fix it. To save your settings, keep hitting menu until you're back to the first screen, and hit mute twice. Then turn your tv off and back on. After using the service menu, my tv is always put in "dynamic" picture mode. Never, ever, ever use this mode. It will make the picture way too bright and kill your tv before its time. Use DVE or another calibration DVD to get the settings right on your tv.

BTW, you can also correct overscan in the service menu, but I wouldn't push it lower than 5%.

Mar 10, 2008 | Akai PTH5498 54" Rear Projection...

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