20 Most Recent LG 500LC Monitor Questions & Answers


It's hard to tell what the problem is without looking at the device itself. A straight-forward solution would be to replace IRF630 with a different MOSFET, that tolerates higher voltages. However, this is not an optimal solution because the problem might be caused by a malfunctioning power supply, a bad filter, etc. It would be of greater help if you provided voltages from the transistor's pins.

LG 500LC Monitor | Answered on Jun 21, 2013


Possible failure of the power supply which can be a switch mode power supply .
Please find tips from the link below:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

LG 500LC Monitor | Answered on Mar 11, 2011


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

LG 500LC Monitor | Answered on Jun 28, 2010


your irf 630 is not original purchase it from proper LG authorised service centre it is costly but never become faulty again duplicate mosfet overheats if your green led is on then measure voltage at E.H.T.connect meter at output transister if E.H.T. is producing then meter should show 1 digit if not then 50v will show take care that signal cable should be disconnected if E.H.T. is not producing then check +vcc at horizontal ic it should be 12v. if 12v is not present then check regulator ic 7812 insmps

LG 500LC Monitor | Answered on Mar 25, 2010


that is problem of diode near EHT that diode connected to big heat sink having three leads two series diodes in one diode replace it even meter shows ok .If persists then check mosfet irf 630 and path of its gate touch heat sink if it overheats then yoke is faulty replace it

LG 500LC Monitor | Answered on Mar 21, 2010


check you video graphics adaptor inside the cpU. or you may try to use another CPU connect your monitor if it is ok their is a problem with your VGA or inside your CPU.

LG 500LC Monitor | Answered on Sep 24, 2009


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.

LG 500LC Monitor | Answered on Apr 22, 2009


This requires more technical in person diagnosis. some things you can try are to boot in to the bios menu.
  • To do this you will have to watch as it is turning on and on one of the startup screens it will tell you to press one of the function keys (F10, F2,F12, and so on) click the one that says "bios" or "settings".
  • After that you will need to search through all the settings for something called the "IDE self test" run that once, it will take a while.
  • and lastly look for another option called the boot order. you have to make sure that the option that says hard drive is first.
I am sorry i can't be of more assistance but not much can be done without seeing the laptop.

LG Computers &... | Answered on Aug 25, 2019


On the phone you would need to gointo settings > wireless and enable your wireless radio. You should then get a notification that wireless networks are available. Select your's or a public wireless network if you're at a coffee shop, ect. Enter any applicable passwords. For this to work you need to verify your phone has wireless capabilities and that the phone and router support the same 802.11 standard. Current Standards are a,b,g,n and ac

LG Computers &... | Answered on Aug 22, 2019


The address bar may have been hidden in the settings options, usually it is near other settings such as "show Menu bar" and "show bookmarks Tab" etc

LG Computers &... | Answered on Aug 15, 2019


Try a reset. The Reset button is on the front panel in the bottom right corner. Once you open the cover you will need a long pin to push the reset button hole. Be patient as it takes a while to boot up.

LG Computers &... | Answered on Jul 12, 2019

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