Question about Computer Monitors

1 Answer

NEC monitor no power, power light blinks

Power light blinks. Have checked caps and transistors on power board. Any ideas?

Posted by on

  • Ryan Lockhart Apr 03, 2008

    I took them off of the board to check them.

  • dignityhanle Mar 18, 2009

    ticking noise no picture

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 42 Answers

How did you check the capacitors without pulling them off the board?

Posted on Mar 27, 2008

1 Suggested Answer

tantong
  • 138 Answers

SOURCE: NEC monitor no power, power light blinks

This is the way how to examine what's wrong with your LCD monitors. After you turned it on and the screen stopped working, you have to check that if you can see the image on the screen or not by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. This is because of the lamps inside screen. Some of them were broken and it is very easy to replace. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so. Hope this help!! If anything I can help you with, feel free to let me know.
Thank you,

Posted on Mar 26, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Dell E172FPb LCD monitor with a black screen and blinking power light, no leaky or swollen capacitors inside, what can I do to repair it? Thanks.


Check out the four transistors (c5706/5707) Emitter to Collector (see picture of the transistor in my transistor album for pinout), it should read open circuit (should be checked out off the board). This is common problem. Make sure to inspect the solder joint in on the board, especially around the inverter transformer pins. Make sure the fuse read out less than one Ohm also.
http://s807.photobucket.com/albums/yy352/budm/Dell%20E173FPb/

Basic LCD monitor and LCD 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

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitor kits: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Replacement board: http://www.lcdrepair.us

Nov 06, 2010 | Dell E173FP 17" LCD Monitor

1 Answer

Monitor has blinking light


Check the transistors and the fuse in the power supply/inverter section.
http://s807.photobucket.com/albums/yy352/budm/Dell%20E173FPb/

Replacement board:
http://www.lcdrepair.us

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

Aug 08, 2010 | Dell E173FP 17" LCD Flat Panel Monitor

2 Answers

BLINKING GREEN LIGHT


You have shorted out transistors in the backlight inverter circuits.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, 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 DELL 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.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Replacement bd: www.lcdrepair.us

http://www.electronicrepairguide.com/dell-E153Fpc-lcd-monitor-repair.html

May 30, 2010 | Dell E153FP 15" LCD Monitor

1 Answer

Monitor won't come on. it blinks with a light and then goes off.


You have shorted transistors (c5707) in the inverter circuits, also need to check for poor solder joints and the tuning caps in the inverter transformers driving section.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, 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 DELL 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.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Replacement bd. www.lcdrepair.us
Service manuals: http://elektrotanya.com/?q=showresult&megnev=dell&megnev2=%20e173fp&kategoria=&kat2=all

May 29, 2010 | Dell E173FP 17" LCD Flat Panel Monitor

2 Answers

The power light on our model E172FPb Dell monitor is blinking. The screen does not turn on. What could be the problem


Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, 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 DELL 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.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Boards: www.lcdrepair.us

May 19, 2010 | Computer Monitors

1 Answer

No picture on monitor - green power light blinking


There's an internal electronic part/s of your monitor that is cold soldered / defective. I suggest to bring the unit to an authorized service center to properly diagnose & fix the problem. regards

May 28, 2009 | NEC MultiSync 75 17 in.CRT Conventional...

2 Answers

Power Light Blinking & Black Screen


A blinking blue light indiactes that your power-inverter board is not putting out what it should. It needs an overhaul which may be a simple as changing out the capacitors on the boards.
It could go beyong that to transistors or even a bad bulb.
It will have to be opened up to do that.
A picture may show visual signs of damage. If you can take one and email it to me , I'll take a look.
Fran

Oct 18, 2008 | HP vs19 (Silver) 19" LCD Monitor

1 Answer

NEC MultiSync FE2111SB 22in monitor problem


a blinking green light usually indicates no video signal. check your cables, and if you have another computer, try it on that. otherwise, carefully check your vga signal cable, and the connections on the neck board [where the crt plugs into]

Aug 11, 2008 | NEC MultiSync FE2111SB 22" CRT Monitor

1 Answer

NEC monitor no power, power light blinks


This is the way how to examine what's wrong with your LCD monitors. After you turned it on and the screen stopped working, you have to check that if you can see the image on the screen or not by shining a flashlight into the screen, not directly but find the best angle to the screen and take a look very closely. If you can see the icons or any image, there will be a minor problem. This is because of the lamps inside screen. Some of them were broken and it is very easy to replace. If you cannot see anything on the screen, there'll be some problems with inverter board. If you have soldering tool and want to fix it by yourself, check the caps first. It may cause this problem. Some caps might show leaking or burn spot on the board because of too high temp. If you don't have soldering tool, you better go get a technician to do so. Hope this help!! If anything I can help you with, feel free to let me know.
Thank you,

Mar 20, 2008 | NEC MultiSync LCD1550ME (Black) 15" LCD...

6 Answers

Dell Blinking Power Light


Just wanted to say Thank You for the info on this site. I had the same problem as previously posted. When powered up, the monitor showed a fast flash of the desktop and then went black, with the power indicator flashing green. I read the posts, purchased the capacitors and the 4 - 2sc5707 transistors through ebay. I ordered them on the 6th and rec'd them today. I only had one bad capacitor and one transistor that checked bad, but I ordered 5 caps and 4 transistors. When ordering the caps be careful of the height of the caps. I found this to be a problem because I ordered the 50v, 105 degree Panasonic caps that didn't fit with the enclosure attached, so I used the 4 good caps removed previously and replaced the bad one with a 470uf, 50v. 85 degree cap from Rubycon I found among my spare parts. Installed the parts and the monitor is working properly (for the last two hours) so I'm happy for as long as the repair lasts. Thanks again for the info.

Dec 05, 2006 | Dell E173FP 17" LCD Monitor

Not finding what you are looking for?
Computer Monitors Logo

Related Topics:

964 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computer Monitors Experts

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18299 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Are you a Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...