LG L1732S monitor flickering bright bluish (turquoise) circles

older post DELL says its 10 years old made in 2008
yes,
did you test this monitor unplugged on PC using the OSD screen
for 10 seconds, each power on OSD works.
see if 50% brightness works, if yes, the PC has problems.
seems you did and did not test monitor on other PC
and did not test your PC on other monitor,.both simple tests.

you are now speculating that one brand is better that another,
Viewsonic is best, HP and deLL< others not so.
what you failed to do is test your PC with known good monitor
and test the monitor on a known good PC.
2 tests. that yell truth.

Id go Viewsonic, we have many here, not one failed ever.
2010 or newer,
back in before year 2010 LED monitors they had JUNK monitors.
with weak low life, CCFL tubes inside, as YOURS DOES.
all monitors had that then, its not maker name issue at ALL.
here is how I discover truth,
1: I PRETEND TO BUY THE MAIN BOARD IN YOUR MONITOR.
AND LOW AND BELOLD CCFL H3LL IS THERE,

• go dim,
• go yellow on white pages.
• strobe.
• totally crazy random works or not,
• blinks
• will not dim right.(gee they are now old and weak)
• last 20,000 hrs (not much) and do all the above,
• now your board see these 4 jacks on the left 1000vdc to CCLF.

I have posted these hard fact there at fixya 100 + times.
here it is 1 more time.
I have the same tubes in my garage ceiling laps 8ft long and do the same thing.
https://en.wikipedia.org/wiki/Fluorescent_lamp#Cold-cathode_fluorescent_lamps

problem with LCD panel replace it

Push the MENU button for 5~10 seconds to lock/unlock the control buttons.

http://www.fixya.com/support/r4460169-lock_unlock_lg_monitor

Did you ever try the original monitor on another machine. If the new monitor is displaying the same symptoms as the old one then your video card is the culprit.

LG 700e
power suply is dad
resistanc is black not show it ohom
plz help

HI Bernard,

This sounds to me like the video lead is loose. Could you please try the video lead each end and tighten the locking screws if possible.

Regards

Nick

Use these charts:
http://www.help4web.net/setup/mire.html

Theory behind it here:
http://www.poynton.com/notes/brightness_and_contrast/

Next time type into Google:
http://www.google.com/search?q=brightness+and+contrast+set+up+page

:)

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.  

Check WGA if it is correctlly put on and go to DISPLAY PROPERTIES - SETTINGS - ADVANCED -MONITOR

BLACK STRIGHT LINE CAME VERTICALLY WHAT I WANT TO DO your question is not clear. but it suonds me that 1 it is due to deflection connector is loose 2 problem in h/ output section related to hor. deflection coil assembly. good luck.