Hello my lg monitor is lg 710b The picture is squeezed in the middle of the monitor. it must warmup for a few houres to work properly. I need The service manual of the interrior hardware

If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY

LCD TV Repair No Power Power Supply Common Symptoms Solutions How to...

Hello,
This usually indicates that the filter capacitors in the power supply are not working right. When the unit is turned on they should build up a charge that lets the board power up the monitor but when they start to go out it takes longer and longer to get the charge built up. Here is a link to information on rebuilding the power supply board by replacing the capacitors, this should get you back up and running.

www.ccl-la.com/catalog/product_info.php?products_id=288

If this is a CRT, then the horizontal deflection circuit is faulty.
The repair is generally not worth on CRT.

First try leaving monitor power cord unplugged for few hours, to discharge capacitors, sometimes this can fix minor problems.

Test also the display on different computers, you never know that this depends from a faulty video adapter.

More likely you will need to replace the screen.

There's an internal hardware problem in your monitor, possibly cold soldered or defective electronic part/s. please bring the unit to an authorized service center for proper diagnosis & repair of the unit. best regards

Pin cushion on old CRT monitors (not the flat LCD type but the larger monitors) use to have a setting called that where it would look like the screen was being squeezed in the middle or pulled outward at all four corners. If you were to take a couch pillow and squeeze it in the middle, you would notice that the corners push outward and if you pull from the middle they retract inward.......that's sort of what pincushion settings do on your monitor. If you play with the setting you would see what I am talking about but on most newer monitors you should have a "auto" button that will calibrate everything for you. But again, this is something you usually will have problems with on older monitors.


Here's a definition of it:

http://www.webopedia.com/TERM/P/pincushion_distortion.html

and here's a picture or two (down at the bottom of this page):

http://www.tpub.com/content/navyict/14120/141200340.htm

Let me know if that helps!

Since the set seems to "correct" itself, it suggests that there may be some poor solder connections that are causing the initial problem. If you can solder, try resoldering the pins of the convergence ICs. If that fails to resolve the problem, let me know and we'll start looking at other component failures.

Dan

B+ line going hi.
probably bad capacitor on hot's collector.
could also be leaky dual diode.
if non of above, look for swollen cap on main board.

It sounds like one of the capacitators inside the monitor is malfunctioning, these little things store a certain amount of necessary power and then discharge it when it is needed.  If it is malfunctioning, it could explain why it takes so long to charge, and why when you hit it, it suddenly comes on.  

first of all , it could be a solder problem try resoldering taking care do not leave any shorts circuits por ahi,may be a shorted coil, you have to test them all,look for a shorted diode esp. in de horizontal area. if any of this things sounds rare, leave it to the repairman!

we have right click on desktop <properties<settings <apply ok