Re: 1800FP Green light on but no image on screen
My only sugestion would to verify that all the voltage regulators are working correctly with the correct out put voltages.
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Re: 1800FP Green light on but no image on screen
try changing that serfice mounted cap out with a standard cap. I just did it with 3 of them on a Dell 1702fp. Is it about a 16 volt 10 UF, that is what 2 of my bad ones were.Leave a comment:
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Re: 1800FP Green light on but no image on screen
i placed one of the A's on the wrong cap. I have corrected the figure and you can used the enclosed pic. The "A" on the cap is placed correctly now.Attached FilesLeave a comment:
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1800FP Green light on but no image on screen
Hi,
A friend brought over a 1800FP monitor he got from the flee market. When you put power to the monitor the green light comes on but there is no image on the screen. If i shine a flashlight on the screen there is not even a faint image on the screen.
I have an 1800FP monitor that i use on my computer but i took it apart to help my friend fix his monitor. So i have a working 1800FP for comparison.
What i did was the following:
To help identify what was causing the problem i disconnected the inverter board and had only the power supply board and the logic board connected. I measured the voltage differences at the connectors. I actually found a difference.
Looking at the enclosed pic you will find two letter "A". One at the connector between the logic board and the inverter board. One at the "+" side of a capacitor. I was measuring the voltages at all the caps and comparing those measurements at the same locations on the "good" monitor. I found that the points labeled with the "A" are at the same "node".
On the good monitor the voltage is a constant ~ 0.034V. WHile on the "bad" monitor the voltage is constant 3.1V.
Any ideas? I think the logic board is "bad" but what i dont know is if the bad component is something i can replace or not. Any ideas how to narrow it down.
I know i could put the good logic board on what i suspect to be the bad logic board but i dont want to do this just yet because i dont wnat to "kill" my monitor as well.
Any thoughts?Attached Files -
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