Question about Westinghouse L1928NV Monitor

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L1928NV circuit board diagram

I have bad capacitors on my L1928NV Westinghouse monitor circuit board. I need a diagram that shows what the stats on the capacitors are, As I am having trouble reading them and one has the plastic piece that goes around it with the information on it has cracked and fallen away.

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Posted on Jan 02, 2017

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SOURCE: Westinghouse L1928NV Monitor won't turn on

Hello,

You have a monitor with a common problem. After a few years some LCD monitorswill blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of he monitor. If you are good at electronics repair/soldering you can usually fix he problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts,replace any that look like the pictures and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. You may also have to replace 2 transisters and a fuse, if they were damaged by the blown capacitors. If you don't want to try the repair yourself we offer a repair service for $45 plus shipping. I hope this helps, if so please rate my solution.

We sell a kit with the capacitors, transistors and fuse for $10.00 plus shipping.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of computer and printer support/repair

Posted on Jul 04, 2009

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  • 152 Answers

SOURCE: I have a Westinghouse L1928NV computer monitor

charla186, I think that you will need to have it evaluated by a TECH type of person. If unit will not turn on it could have a 'switch-mode-power-supply" failure and / or "backlight" inverter supply failure. You didn't state the AGE and or approximate "ON" hours this unit has. I don't quite know what you mean with "the power went out"?? Power to the whole house or office? or did you mean just the LCD monitor? Here are some options you might try. Warranty??? or Check with Westinghouse about a CASH + old monitor swapout for a fully refurbished same model. Have a local TECH at a TV/ monitor repair shop evaluate it's condition. I will also suggest you visit YOUTUBE and view some short video clips of LCD monitor disassembly just so you know what is inside a typical LCD and then know what the top 2 causes of monitor failure are. In any case get back to me and let me know what you think you will be your plan of action. I'm louie12fix on fixya or lmistyrel@aol.com Bye for now

Posted on Oct 05, 2009

  • 13433 Answers

SOURCE: I've got a Westinghouse L

Hey

its a very common problem in all lcd monitors, the powersupply wears out, you can probably repair it yourself by replacing all the electrolyte capacitors on the power board, or just the ones that are bulky or not flat.


Often if you turn the monitor off and on off and on until the picture finaly stays on the screen the screen will work until turned off again.


this will get solved by replacing the capacitors, your going to need a soldering iron and know how to use one?

Posted on Dec 11, 2010

budmrtn
  • 11361 Answers

SOURCE: I have a Westinghouse L2046NV Monitor and it does

You may want to get the capacitor kit, but you need to get the board number used in your monitor version.
Eample of the kit:
http://cgi.ebay.com/Westinghouse-L2046NV-REPAIR-KIT-LCD-Monitor-DAC-19M005-/320608826408

I will not use RadioShack caps, since they are not low ESR type which is required for switching power supply, they will not last if you use generic electrolytic caps.

You should remove one cap at a time so you can see what the value is for each cap.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Posted on Aug 18, 2011

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1 Answer

Re: L1928NV has gone black yet light is still green. could it be a fuse and how easy is that to replace?


It can be power supply for the inverter circuits has failed (bad DC filter caps), failed backlights inverter circuits, and worst case will be bad lamp assembly.
You need to open it up and do in-depth trubleshooting, you will need proper tools to do the repair.
You may want to read my guide first to see if you will want to buy new monitor or DIY repair.
Example of failed WESTINGHOUSE: http://s807.photobucket.com/albums/yy352/budm/WESTINGHOUSE/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Aug 22, 2011 | Westinghouse L1928NV Monitor

1 Answer

Unit comes on when pluged in does not have a picture, will not power off unless you unplug it. screen is lit up and has a blinging action


Short in the power circuit will cause it to stay on until the power is removed. The fault you describe is probably down to a fault on the circuit board. The power capacitors could also be faulty, and the lack of an image would seem to confirm this.

I'd suggest that the monitor should be taken to a competent technician for further analysis and possible repair. I'm not sure what you mean by blinging action, but if you mean an audible crackling or noise, this suggests arcing of power to earth. If you mean a flashing screen, it could be the capacitors trying to fire up the HT circuit but leaking to earth as they do so

Jul 22, 2011 | Westinghouse L1928NV Monitor

1 Answer

My monitor the turn on light turns green but nothing is showing in the monitor itself


It can be bad caps, or blown MOSFET in the inverter board. What is the monitor number?
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed WESTINGHOUSE monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you

Nov 02, 2010 | Westinghouse 19" Widescreen Flat Panel LCD...

1 Answer

After a couple of minutes operation the screen goes blank. Switch the power off for 30 seconds and it refreshes and works ok for a couple of minutes tahen repeats all over


the problem of ur monitor is the power supply board,it is located in the inner part of ur monitor,technician is allowed for that problem.you need to call a technician for repair.

Oct 03, 2010 | Westinghouse L1928NV Monitor

1 Answer

Screen turns on and then goes away


This is most likely a backlight related problem. If the power light stays on after the screen "goes away", then it is most likely one of two problems:

1) Something is wrong with your power/inverter board. Most likely you will need to replace bulging or bad capacitors on the power board. They will like have voltages between 16-25V and capacitances of 470-1000uF. You will need to disassemble the monitor, remove its power board, and inspect it. If you notice bad capacitors, you will need to desolder them from the board and solder on new compatible ones. This should solve the problem.

OR

2) If replacing the capacitors doesn't solve the problem, the problem may be with your backlights themselves. If you are able to test them, that would be best. Replacing them is a pain as you will have to disassemble the LCD panel itself to get them out. You will then have to replace them with compatible backlights of the same size, which you can salvage from similarly sized broken monitors.

Keep in mind that the suggested actions above are for individuals with some experiences in soldering and repairing circuit boards or LCDs. Also be sure to wear anti-static gloves or wristband and keep the monitor unplugged when performing the above stated actions (except of course when testing voltages).

Jan 12, 2010 | Westinghouse L1928NV Monitor

1 Answer

Lcd model L1928NV takes 2 to 3 dozen times turning on and off to get image stays on momentarily or stays on at times get message "no signal input" any ideas


doug_karr, Well, Why don't you get inside the monitor and find the "thermally sensitive/intermittant, cold, frosty looking" solder joint on the "switch-mode-power-supply"/"CCFL inverter supply" and do a nice touch-up job of resoldering it. Also look for FAILED, SWOLLEN, looking electrolytic filter capacitors and replace them with new ones if required. Read my fixya profile for all your options. Good luck guy.
12fixlouie aka louie12fix

Jan 10, 2010 | Westinghouse L1928NV Monitor

1 Answer

Westinghouse L1928NV Monitor won't turn on


Hello,

You have a monitor with a common problem. After a few years some LCD monitorswill blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of he monitor. If you are good at electronics repair/soldering you can usually fix he problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts,replace any that look like the pictures and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. You may also have to replace 2 transisters and a fuse, if they were damaged by the blown capacitors. If you don't want to try the repair yourself we offer a repair service for $45 plus shipping. I hope this helps, if so please rate my solution.

We sell a kit with the capacitors, transistors and fuse for $10.00 plus shipping.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of computer and printer support/repair

Jun 27, 2009 | Westinghouse L1928NV Monitor

1 Answer

L1928NV


The problem on monitors when this happens is usually a powerboard problem in which the capacitors are failing due to age and use. Once in a while a transistor goes bad, but since it does run for a bit, it should be your capacitors.
If you can take it apart, these are usually noticable, If you send or post a picture, I may be able to tell.
ebay board repairer,
bammbammfran

Oct 20, 2008 | Westinghouse 19" Widescreen Flat Panel LCD...

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