Question about LG 500LC Monitor

1 Answer

LG 700E monitor's power LED blinking continueously, no display

I have a LG 700E (Ic - LGM148-03C-007) and after switching on
LG 700E monitor's power LED blinking continueously and there is no display and no relay sound at startup, but inplace another monitor working properly. Sometime it automatically wakeup, but take 20 to 30 minute, sometime more. Please tell me how can i resolve this problem and how can i get service manual for this monitor. i have a lg 500 monitor. The power led light blinks continuously and after 5 mins it becomes normal, and i can see a display. Now, it just keeps on blinking continuously and i am not able to see any display at all. Has anybody solved this problem ?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • LG Master
  • 19,396 Answers

The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor 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 a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor 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.

Common faults that can occurr are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

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.

Posted on Apr 22, 2009

Ad

3 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
pgmadhav

pgmadhav

  • 145 Answers

SOURCE: blinking of moniter 700e lg

I think that two capacitors in the powers supply circuitry(incise the monitor) has gone bad. Just open and you'll see them.
This should solve your problem.Best of Luck.Please rank me appropriately. If you want any clarification, Please get back to me

Posted on Jul 27, 2009

Anonymous

  • 1 Answer

SOURCE: LG 700E monitor's power LED blinking continueously, no display

I had a similar post about an LG 505G. Just bought a new LCD monitor and decided to open the monitor before putting it on permanent storage. I noticed a bloated capacitor in the control board just adjacent to the low voltage power supply. It was a 1,000 mFd 10V cap. So what the heck I desoldered it and replaced it with a spare 50V capacitor of the same rating I had lying around. I assembled the unit plugged it in and VOILA!!! the monitor was working again. Hope this helps.

Posted on May 09, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Preset mode in lg crt monitor


if you do repairs then disassemle the monitor.where the power cord is thats the power supply resolder the main components in the power supply. cause some of the them are not making good contact on the circuit due to the age of the monitor and constant heat over the years.

Sep 03, 2012 | LG Computers & Internet

1 Answer

I have a LG 700E and after switching on the monitor's power LED blinking continueously and there is no display and no relay sound at startup, Another monitor if attached to the same system is working...


Hi, I believe that the monitor has gone to sleep mode (hybernate mode). Please check and confirm that it is not running in this mode.(System properties) or display modes. Good luck.

Jun 13, 2011 | LG Computers & Internet

3 Answers

700e Lg crt monitor problam power on eht on but not display


The normal crt monitor have a demo display when you unplug the vga cable to PC like this image below.. fd6b6b9.jpg
Note:
If the crt monitor green LED light steady and heater beam have light, the horinzontal and High Voltage supplied to tube is completely good. If you encountered this problem just focus on video section of crt monitor. But before you start... find the flyback transformer behind this they have two controls screen & focus. After you found it plugin the monitor use plastic precision or small screw philip driver for safety to high voltage at horizontal area choose screen control rotate it to clockwise direction follow this....
5b5166c.jpg If the display responses or from dim to lighter 100% you have a problem to ABL find this at the bottom of horinzontal section near at flyback transformer pins trace the line of ABL for dried solder, open resistor if nothing happen find the Video IC at chroma section and replace it. follow this...
3c6e89c.jpg For LG & Redfox you found LM1269NA Visit this site for seaching semiconductor matches www.alldatasheet.com Good luck.

Check this site for searching semiconductor
www.alldatasheet.com

Aug 12, 2009 | LG Studioworks 700S 17" CRT Monitor

1 Answer

Blinking of moniter 700e lg


I think that two capacitors in the powers supply circuitry(incise the monitor) has gone bad. Just open and you'll see them.
This should solve your problem.Best of Luck.Please rank me appropriately. If you want any clarification, Please get back to me

Jul 27, 2009 | LG Studioworks 700S 17" CRT Monitor

3 Answers

THE POWER LED (GREEN) IS BLINKING CONTINUOUSLY


LG 700E monitor's power LED blinking continueously and there is no display solutin ........

5_28_2012_9_36_17_am.jpg

May 30, 2009 | LG Flatron F700B 17" CRT Monitor

6 Answers

LG 700E monitor's power LED blinking continueously, no display


5_28_2012_6_39_43_am.jpg
LG 700E monitor's power LED blinking continueously, no displaySolution.............

Jan 23, 2009 | LG Studioworks 700S 17" CRT Monitor

1 Answer

I change the memory ic of lg 700e monitor the control pannel menu not displaying in english?


1. replace the control panel Micro switchs.

2. replace the 7805 reguletor near to control proccer.

Oct 14, 2008 | LG Studioworks 700S 17" CRT Monitor

1 Answer

Lg 700e monitor


check dry points in power supply & Horizontal, video section(CRT Neck board)
check output voltages from SMPS
check 5V from SMPS to MICOM IC

Sep 25, 2008 | Computers & Internet

3 Answers

LG 17" MONITOR MODEL 700E (COLOUR & SHAPE PROBLEM)


THE PRESCRIBED ARROWS ARE FUNCTIONING WELL FOR INCREASING THE VERTICAL SIGE OF THE DISPLAY OF THE MONITOR.BUT THE HORIZONTAL AROWS WHEN OPERATED ARE NOT ABLE TO INCREASE THE HORIZONTAL DISPLAY OF THE MONITOR TO FULL SIGE. PLEASE GIVE APPROPRIATE SOLUTION.
THANKS

Aug 14, 2008 | LG Studioworks 700S 17" CRT Monitor

Not finding what you are looking for?
LG 500LC Monitor Logo

1,385 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Computers & Internet Experts

Ekse

Level 3 Expert

13434 Answers

Alun Cox

Level 3 Expert

2679 Answers

k24674

Level 3 Expert

8081 Answers

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

Answer questions

Manuals & User Guides

Loading...