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KORG x 50 can not read LCD display

It seems there is enough backlight, but The text appears so dim its illegible . I turned up the display contrast as far as it would go (60-something-strange maximum huh?) & it barely improves. Still can't read it.

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I have a korg pa50sd, but its lcd brightness is too high..how to control this? it is very difficult to read?


There is no adjustment to control the brightness in korg pa50/sd.
It is hardware problem.
-Is the white backlight that is too high?
or
-normal backlight,but words is too dim?

Both of that case,can be caused by damage / change of voltage control for lcd. Perhaps there are parts that are damaged or have changed in value. Typically capacitors etc.
If the backlight is too bright, then the damage is in backlight controller, may transistor or an inverter transformer.
Proceed with the repairs to the experts.

Jul 08, 2015 | Korg Music

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Why LCD TV have No Picture only sound


Flat-panel LCD TVs have a lifespan newly approaching 100,000 hours on average. The lifespan of an LCD TV is generally longer than that of similar-sized plasma televisions. Some manufacturers even claim that their LCDs can last upwards of 100,000 hours when used continuously under controlled conditions (e.g., in a room with "standard" lighting conditions and 77&deg; temperatures throughout). Just how realistic such claims are is debatable. After all, whose living room has no windows and remains at a perfectly comfortable 77 degrees year-round? <br /> In any case, the pictures on fluorescent backlit LCD TVs will show some "wear" because they are generated by powerful lamps, which, like any lighting appliance, will dim over time and with use. The picture you see will dim ever so slightly as the backlighting bulbs dim. One other consideration is that CFL fluorescent backlighting will change colors over time. This will change the white balance on your TV and cause color calibrations to be thrown off. <br /> Therefore, the most important thing to consider when it comes to the lifespan of your LCD TV is the actual lifespan of the light source in your LCD. LCD TVs last as long as their lightsources do. So, the lightsource in your LCD TV is the critical component of your LCD display unit. Newly introduced LED backlit LCD TVs will have the best long term performance. LED backlighting is superior in that the white balance of the TV will not be affected by changing bulb color over time. It's a more consistent bulb technology and will also maintain its brightness longer. <br /> The edge lit version of LED TVs will use far less energy while local dimming LED backlighting will be more accurate and present a better picture while using more power. We believe that local dimming LED backlighting will be slightly less stable from a life span standpoint. <br /> To ensure the integrity of your lightsource for the duration of your LCD display's lifespan, you will definitely want to adjust the CONTRAST setting of your LCD TV. Too high of a CONTRAST level will prematurely age your lightsource because it will have to work harder to maintain such light intensities. Your best bet is to keep your CONTRAST set appropriately for the conditions under which your view your LCD display. Brighter ambient light levels require slightly higher CONTRAST levels, while lower ambient light levels demand less CONTRAST <br /> If there is sound but no picture, only sound it has more chances of faulty back light repairable from Service Support. <br /> Hope this helps, if so do rate the solution. <br />

on Jan 08, 2011 | Sony BRAVIA KDL-40S2010 40 in. LCD...

1 Answer

My lcd backlight is very pale, how can I encence the brightness??


Reading your user manual on page 12, bullet 9 you will find the method of changing the contrast of the display. There is no brightness adjustment possible, however the contrast DRASTICALLY affects the readability of the display.

Jul 23, 2011 | Korg PA500 61KEy PROFESSIONAL ARRANGER...

2 Answers

What is opc light on my sharp aquos tv


This can be called Optical picture control and it adjust to suit the room light.

Please read the text below"

Dynamic Backlight Control - One of the nice features of the Sharp AQUOS LC-32D6U is what Sharp calls OPC, a name they use for their dynamic backlight control. You might also see this feature referred to as a dynamic iris on other LCD HDTVs or disguised under some proprietary name, but fundamentally the principle is the same. Its primary function is to try and maintain a high Full On/Off contrast measures the ratio of the light output of an all white image (full on) and the light output of an all black (full off) image. 2) ANSI contrast is measured with a pattern of 16 alternating black and white rectangles. The average light output from the white rectangles is divided by the average light output of the black rectangles to determine the ANSI contrast ratio. When comparing the contrast ratio of video devices make sure you are comparing the same type of contrast. Full On/Off contrast will always be a larger number than ANSI contrast for the same video device.">contrast ratio under any lighting condition. So when room lights come on or off or the sun enters the room, with OPC enabled, the backlight in the LCD will dim or brighten depending on the amount of light in the room. This is managed by a light sensor located on the front of the unit. When OPC is enabled there can be a slight reduction in the dynamic range of the display as the display attempts to maintain contrast and color saturation as room light changes. We had a chance to compare this feature with another LCD HDTV that was of comparable size but without dynamic backlight control, and the Sharp AQUOS LC-32D6U with OPC enabled was the clear preference.

Jan 24, 2011 | Sharp Televison & Video

1 Answer

Nothing appears on the display.


You could have a faulty inverter or a CCFL lamp, To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Jul 07, 2009 | HP Pavilion ze2000 Notebook

1 Answer

Phone display is very dim-can barely read


Well, first you will have to check your options, if you can read it enough to get in there.  You may have the backlight turned off.  If the backlight is not turned off, then you probably have a bad backlight and will have to take it to your provider to get it fixed.  Replacing a screen/backlight is not something I would attempt to do unless you are certain you know exactly what you are doing as you can render the phone completely useless.  

May 28, 2009 | Motorola Mobility MOTO W755 Cellular Phone

1 Answer

My laptop will, once in a while (every couple months), have3 "issues" with its brightness/contrast. If I leave the brightness alone, it will turn most of the screen red. If I lighten the brightness AND the...


You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:
  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display or appear black.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

May 14, 2009 | Gateway M320X Notebook

1 Answer

Display has become almost illegible


Maybe your Contrast is screwed up. Try soft resetting, then hold "Alt" and the ">" or "<" key at the same time. You can also see if you can turn up the brightness, using the two keys next to the delete key.

Nov 22, 2008 | NEC MobilePro 900c Pocket PC

1 Answer

Compaq Presario R3000 dimmed LCD screen


If your inverter is good I,de say your backlight is going bad, I just replaced mine in a sony vaio and now it seams to bright.

Oct 20, 2008 | Compaq Presario Notebook

1 Answer

Gateway FPD 1830 18.1 in. Flat Panel Problem


Usually in these cases the power supply would be the issue, but you say the OSD window shows up clearly, So the LCD panel is good and the Power Supply /inverter depending on which your FPD has.
FPD 1830 should have 3 boards(logic, Inverter, Power) otherwise just 2(logic, power)

If it is super dim, the problem is the inverter. Or the Power Supply if the inverter is embedded

Otherwise what your issue is the logic board, if you can swap out that part for a good one, Chances are for sure that you will have a spanking new FPD working.

I've worked with these a lot. Im working on one right now.
I hope this helps
Wish you luck
Victorsinferno45

Sep 11, 2008 | Gateway FPD 1830 18.1" Flat Panel LCD...

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