LG 34CB99 User Manual (English)

Questions and Answers:

J
Joel ZimmermanJul 29, 2025
What to do if nothing is displayed on my LG 34CB99 screen?
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  barbaragarciaJul 29, 2025
  If your LG Monitor screen is blank, here are a few things to try: * Ensure the power cord is properly connected to the outlet. * Verify the power cable connection and press the power button. * Make sure the correct input is enabled by going to Menu > Input. * If the signal from your PC's graphic card is outside the monitor's frequency range, check the Product Specification section of this manual to set the correct frequency. * Check the cable and try reconnecting it.
B
bellraymondAug 6, 2025
How to fix a blank screen on my LG Monitor?
- S
  Stephen AndersonAug 6, 2025
  To resolve a blank screen issue on your LG Monitor, start by checking that the power cord is securely plugged into the power outlet. Next, verify the power cable connection and ensure the power button is pressed. Also, confirm that the connected input is enabled via Menu > Input. If the problem persists, and the signals from the PC are out of range, refer to the Product Specification section of the manual to set the appropriate frequency. Finally, inspect the cable and reconnect it.
C
Charles CooperAug 12, 2025
How to troubleshoot a black screen on an LG 34CB99?
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  Albert McguireAug 12, 2025
  To troubleshoot a black screen on your LG Monitor, first ensure the power cord is properly plugged into the power outlet. Next, check the power cable connection and press the power button. Verify that the connected input is enabled (Menu > Input). If the signals from the PC (graphic card) are out of the horizontal or vertical frequency range of the monitor, please see the Product Specification section of this manual to set the appropriate frequency. Lastly, check the cable and reconnect it.
D
Dominic JeffersonAug 20, 2025
What to do if my LG 34CB99 Monitor has no display?
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  Christopher DavisAug 20, 2025
  If your LG Monitor shows no display, try these steps: 1. Check if the power cord is correctly plugged into the power outlet. 2. Check the power cable connection and press the power button. 3. Ensure that the connected input is enabled (Menu > Input). 4. If signals from the PC are out of range, see the Product Specification section to set the correct frequency. 5. Check the cable and reconnect it.

LG 34CB99 Specifications

General

Screen Size	34 inches
Resolution	3440 x 1440
Panel Type	IPS
Aspect Ratio	21:9
Brightness	300 cd/m²
Color Gamut	sRGB 99%
VESA Mount	100 x 100 mm
Contrast Ratio	1000:1
Response Time	5 ms
Connectivity	HDMI, DisplayPort, USB-C
Speakers	Yes
Viewing Angle	178°(R/L), 178°(U/D)
Ports	2 x HDMI, 1 x DisplayPort, 2 x USB 3.0