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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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6 Suggested Answers

  • 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

Geekman
  • 32281 Answers

SOURCE: I have come across an

The problem is a back light fault and is caused by either a faulty inverter board or a faulty CCFL lamp.
You can source parts from the Internet. Try these WEB sites :-
Normal 0

www.lcdparts.net

http://www.nylaptopparts.com/

http://www.ccflwarehouse.com/

Posted on Oct 03, 2010

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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...

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I have a Planar 1910(Black) LCD from a friend. It first had a problem where it would show no display but the power LED would flash green to orange. I fixed the problem by reseting it. Now that the display...


It has white screen becuase it may not be getting the 5vdc from the logic board to the T-CON board or the board has blown fuse.
Please see http://s807.photobucket.com/albums/yy352/budm/LCD%20panel/

Also look to see if power supply/logic bd had any bad caps also.

Aug 14, 2010 | Planar PL1910M (Black) 19 in. Flat Panel...

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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 | Computer Monitors

1 Answer

Hp flat panel monitor comes on shows logon and then blank screen


Ok, another words, monitor powers up for few seconds and shuts down by itself. If green LED on the front panel turns off as well or stays on?
If stays on, then inverter turns into protection mode because of old backlight lamps.
If it turns off in same time with an image on the screen, then there are some bad electrolytic capacitors in the power supply.

Sep 11, 2009 | Dell E152FP 15" Flat Panel LCD Monitor

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PLANAR Flat screen goes blank and then wil not come back on, blinks a second then dies.


Hi...there
Sure, you can fixed by replaced the backlight inverter or repaired it.

Oct 31, 2008 | Planar PL1910M (Black) 19 in. Flat Panel...

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On and off


Sounds like it is shorting out. Do a voltage check on the power source.

May 26, 2008 | Computer Monitors

2 Answers

Backlight replacement


Are you sure it's the backlight? Many Planar LCD monitors have issues with the capacitors on their power supply boards. The symptoms include a power light and no picture, or just a flash of a picture when powering up and then nothing.

The fix for some of these problems is about $8 on new capacitors (Plus shipping).

On the PL2010M monitors you need the following parts. I've added digikey part numbers to make life easier:

P10271-ND 220UF 25V Capacitor (3/4 depending on PS)
P10275-ND 470UF 25V Capacitor (1)
P10221-ND 470UF 10V Capacitor (4)

If you're not comfortable with soldering and de-soldering electronics, take it to a local technitian for the work and give them the parts list above. That should work if the failure looks like I described. I've fixed several of these monitors so far. All the problems were related to the power supplies. Same with the Planar PL1700 LCD monitors.

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