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Planar PL191M backlight down afer secondes

Hi,
the backlight shut off after 1 to 10 secondes but the green power LED still on so i can see displaying with a flashlight. the IC in inverter board is TL1451 please help

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  • 3 Answers

SOURCE: Backlight inverter

A backlight inverter is the power supply to power the lamp or lamps in an LCD display, so when you look through the LCD there is a souce of light behind it. Kind of like holding a peice of paper up to a light and looking through it, The light from behind shines through the paper or in your case the LCD display. You would have to open up the LCD case in order to find what is usually a long thin board, similar to the one below. This may need to be replaced or you may get lucking and just be able to replace the F1 (fuse) component and fix it. (or have a techical friend do it for you)

Posted on Oct 19, 2008

leroyal
  • 2120 Answers

SOURCE: Hello,

Try eBay for those parts.

Posted on Feb 20, 2009

  • 1 Answer

SOURCE: Monitor black screen with blinking amber/green light

You need to reset the display. The display is in a safe mode. Resetting the display is a simple procedure and Planar has the instructions on their website in their online customer support section.

Posted on Feb 26, 2009

budmrtn
  • 11361 Answers

SOURCE: Planar Pe191m goes dark image seen with flashlight

I would suspect either the power suuply or inverter circuits, look for bad caps first which is common problem, see example of failed monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums
If you want replacement lamp, you can look here, it also gives you info on how to measure the lamps dimensions: http://www.lcdparts.net/

Posted on Mar 09, 2010

micromatikal
  • 2777 Answers

SOURCE: Acer AL511 15" I need advice in repairing this

Ok so what is your question exactly, I do not see a question in there?

Posted on Sep 28, 2010

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Sanyo DP46142 TV comes on for approximately 30 seconds and then screen goes black. Power LED stays on.


Sounds like a backlight problem to me. If you input a signal to the HDMI or Composite input and then it goes black have you tried taking a flashlight to the screen to see if the picture is still there but just dark? That would indicate a backlight issue. That model appears to be an LED edge lit backlight, so if the picture is still there after going black your going to have to trace out the backlight circuit and see whats going on. Usually with LED backlighting if it comes on at all then the LED's are good, its just the driver supply thats failing to keep them on. Some TV's have a small separate board that provides the backlight control, but i suspect with this model its on the power supply board and not the motherboard. Have you checked that board? It could be bad caps on the power supply board, check the voltages to the backlighting when it lights up and then when it goes dark. It could just be some failed capacitors on the power supply causing that voltage rail to drop off.

May 04, 2017 | Sanyo Televison & Video

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Samsung LED TV UN46ES8000 powers on briefly then shuts down. Does anyone know what the issue is?


Had the same thing with my LG, this is the advice I got : 'it sounds like power supply failure, which may be capacitors,'. Not had it done yet, so can't say more.

Nov 07, 2016 | Samsung UN46ES8000 46 inch 240hz 3D Slim...

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Dealing with a Planar PL1700-BK computer monitor. When power is supplied, the "no signal" box flashes, then the screen goes black. When hooked to laptop, screen shows desktop, then goes black.


Planar PL LCD Monitor Fix - MarsBox.com

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Nov 3, 2008 - Planar PL LCD monitor has flashing power led with no image. ... You will know it worked if the monitor diplays "No Signal" message when ...

What is the method to reset the Planar 1910m monitor?

superuser.com/.../what-is-the-method-to-reset-the-planar-1910m-monitor
Apr 6, 2010 - My monitor (a Planar, apparently model number PL1910M) is not working. (It is flashing a green / orange sequence which I believe to be an error code. The sequence, in ... I wasn't even seeing a "no signal" message and I couldn't turn it off using the power button. ... Computer resets when put under load.

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Repair ViewSonic VX924 LCD Monitor Blinking Green power Button ... cant switch back & forth to desktop out of some games without the monitor going .... Nothing else on the board looks bad, the power supply board is dark brown ... to this madness we are unfortunantly dealing with daily with our monitors.Missing: planar ‎pl1700

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1 Answer

Klv32s310A sony bravia gets start on with green light and after a second turns to stand by mode blinking the red light 6 times after each 2 second interval


Hello Sagar,
green led means tv powered on and status ok.
Red blinking light almost always means defect, overcurrent or overload.
6 blinks for Sony lcd flat tv means trouble in backlight circuit, or backlight inverter (backlight illumination or lighting makes your tv screen visible).
common problems in the inverter circuit, which drives the backlight, or shorted drivers, or short-circuit transformers or open circuits.
You should find the problem in the inverter circuit, or in the power supply board or in the main board.
Also look for bad capacitors (electrolytic caps) which are bulged and swollen on top.
Decoupling plugs from printed circuit boards can help you in finding the problem board by elimination method.
If you power up the set after unplugging certain plugs on f.e. the inverter board , this could result in getting a green power led and concluding that this board is faulty.

succes,
Walter from Antwerp, Belgium.

Dec 30, 2014 | Sony Televison & Video

1 Answer

PL191M works for 10 seconds, then goes off with small green light blinking. If I turn it off and back on again, it works for 2 seconds and goes back off. The owner's manual says to push the upper...


There is a couple of possibilities and things to eliminate.
Your monitor is acting like it's not getting a signal. First make sure your video cable is plugged in and tightly connected with the screws fully torqued down. Test the video card by wiggling the connected cord to see if the monitor comes on even temporarily. Try opening the case and re-seating the video card.
If you can get the monitor to stay on long enough go into the control panel and the properties page and make sure you screen saver or power management for energy savings is not set to zero.
If it's new you may have to go the your control panels add remove components and un-install the video card then re-install the driver again. Windows is famous for this requirement.
If you are using this as a second monitor connected to a laptop you will have to hit the corresponding function key on the top row of your keypad, F4 or ?...., to open the port to avail the signal.
On a mechanical level at the monitor depress the Menu button and try a few sizing adjustments to bring the picture back to shape.
Cable - HDMI, USB, VGA ? You may need an adapter to get the signal VGA to HDMI etc.
We need more information but try these things to start.
  • New Monitor
  • 2nd Monitor for laptop
  • PC or Mac
  • Type Cable
  • What happened when it quit working
  • Has it ever worked.
Let us know how we can help further.
TF

Sep 16, 2011 | Planar PL191M 19 in. Flat Panel LCD...

1 Answer

Hi, when power is applied the monitor displays a picture for about a second and then the picture goes off. The power LED stays green. any help is appreciated, thanks. Mike Nedin


Look for bad caps (bulging tops) in the power supply, also verify that you do have the 12vdc feeding the backlight inverter circuits. The problem can be bad power supply, bad backlight inverter, and bad lamps.
See example of failed monitors due to bad caps here: http://s807.photobucket.com/home/budm/allalbums
90% of monitors I repair are due to bad caps.

Jan 21, 2010 | Computers & Internet

2 Answers

Lost picture. When using main power button, the


Tries unplug,replug the tv an hour later might work.But this a temp.fix,must replaced the backlight video board sooner or later.

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PLANAR PDP-42BK NO VIDEO SIGNAL


who changed the caps and what caps did they change, also there are two switches on the board one should be normal and the other on 30v

May 12, 2008 | Planar PDP-42BK 42 in. Plasma HDTV

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