I've got a problem with L1900E, when i turn it on the logo shows up (very dark) and dissapear, and i have to wait a few minutes to see anything. Picture is blinking and it's barely visible. I have to wait 30 mins to see desktop, but it's still too dark. Using forte manager doesn't seems to change anything about brightness. I'm equipped with miliammeter and frequency counter, i don't have an oscilloscope Is it CCFL need to be replaced or it's an inverter problem?
1st try to check circuit that is operating CCFL, otherwise replace CCFL , it does not look like ccfl problem
You need to be more specific, i dont have even a circuit diagram of the inverter so i have no idea what i should be looking for
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SOURCE: Viewsonic VX900 blank screen
Here is a pic of the fuses on the inverter board for a Viewsonic vx900, you can visually inspect them as well if you do not have a volt meter. While visual inspection is not 100% reliable, usually when these are popped you will see the red line across them is black or broken.
SOURCE: LG L1900E flickering after cold start
This is probably due to a bad solder joint somewhere. Bad solder joints can effect a unit in the reverse also. IE works at first and then dies after it gets warm. Think about how metal expands when it is heated. And contracts as it gets cold. If there is a hairline fracture on one or more component joints, this would cause it to not have such a great or solid connection when it is cool, or contracted. As it gets warmer, the solder expands therefore filling the void and giving it a good connection.
Regardless, it will likely only get worse over time. If you're handy with a soldering iron, pop it open and reflow all the joints. Especially the ones on the transformers and copper coils. Best to hit them all, excluding the tiny surface mount devices.
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SOURCE: TFT VE710b backlight needs 20 Minutes to light up fully.
The inverter is yoru problem. It takes a while to build up the voltages that is needed to drive the bulbs.
Unless you are operating the monitor in temps below around 40 degrees F... temp is not a factor.
Your prob getting ready to buy a new one. Your inverter(s) are on thier way out.
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