Question about Zeiss Gdx/vcc Rnfl Scanning Laser Polarimetry Oct Tomographer Optometry

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Screen is black

Power is on & machine warms up... can faintly see startup screen for a few moments and then the screen is so dark that you cannot view menu options. Blue selection buttons around the screen are lit and you can hear it selecting an option when you press a button, however, you cannot see which options you are selecting because the screen is black. Is there a contrast setting knob (like on a computer monitor)? or does it sound like the main fuse needs to be changed?

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It sounds like the backlight of the LCD display is out. The Image is still being displayed there is just no light to illuminate the image. Try shining a flashlight on it (Put the light right against the screen) and see if you can see what's on the screen. The display is fairly easy to install but I do not know where you can purchase one directly.

Posted on Jun 26, 2017

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Posted on Jan 02, 2017

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1. When you press the power button to turn it on, do you see any thing on screen, It probably should show an ACER logo?

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You likely have a LCD set there which may likely use a back light inside to light the image, get the room as dark as you can and with a flashlight illuminate the screen from a angle, with set on if you can see the faint image on the screen of the program you have a Backlight issue'

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The dark or black picture is caused by a failure in the back light power supply. The problem can be corrected by replacing a few parts called capacitors on the board. Replacing them will require a little soldering but anyone can do it. Here is a link to a page that shows what needs to be replaced.

http://www.ccl-la.com/blog/index.php/gateway-fpd1975w-monitor-repair/

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When you say the screen is dark, do you mean that the picture is still faintly visible or is the left side black with a sharp edge between the black and the visible picture?

If the screen is dark with a faintly visible picture then you have a faulty backlight. This could be due to the inverter board, which can be repaired or replaced, or it could be the CCFL tube which is a bit harder to replace.
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