Question about LG Studioworks 700S 17" CRT Monitor

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Display problem Display in my monitors appears in the Half portion of Screen for 15-20 Mins from the start of the PC and it become normal after 20 Mins itself. I have already cleared the dryness of the PCB. But problem still persist. Pls help.

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  • Lats Mar 22, 2008

    Display in my monitors appears in the Half portion of Screen. Pls help.



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Pls check all the electrolytic cap after the secondry power and electrolytic cap to in/output the vertical ic and at horizontal cct.


Posted on Feb 04, 2008


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Half Screen

It is either the lcd panel OR the video card / motherboard or it could just be a completly bad driver.
If you turn it on and hit f2 or f8 does it appear in this screens?

If not, it is a bad driver.
If a bad driver, turn on hit f8, choose low video resolution mode, surf to your manufacturers website, download, install and reboot.

Try display to an external monitor, if the line appears on the external monitor, the issue is a bad video card.
you will need to connect to another monitor or your television to your computer with the vga lead monitor connection
click start control panel display change display settings adjust resolution this may vary depending on your operating system you should a no 1 and a no 2 with detect and identify keep an eye on
the screen when you select the number tabs this may vary depending on your operating system when you select the no 2 tab this should be the extended desktop always click apply after making any changes
If the issue does NOT appear on the external monitor, the issue is the lcd panel.

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I have lenovo screen flickers in every 5minutes...

Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

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I would follow the self-test below. If you see the same issue in the test screen then your monitor has lost it's sync and would need a board replaced.

If it dosn't appear during the test, then you might want to test it on another PC.

Self-Test Feature Check
1. Turn off both your computer and the monitor.
2. Unplug the video cable from the back of the computer.
3. Turn on the monitor.
If the monitor is functioning properly, you will see a box in the illustration below.

This box appears during normal operation if the video cable becomes disconnected or damaged.
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If your monitor screen remains blank after using the previous procedure, check your video controller and computer system; your monitor is functioning properly.

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