Re: Dell SP2008WFPt no picture
1-3 427 ohms
2-3 infinite ohms
1-2 infinite ohms
I'm pretty sure some of these combinations charge a capacitor since 1-3 will sometimes show infinite resistance right after testing another combination. Does that make sense?
kynax
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Last Activity: 03-09-2011, 09:58 AM
Joined: 09-01-2010
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Re: Dell SP2008WFPt no picture
The rightmost pin is indeed connected to ground.
The leftmost has 1200 ohms of resistance with pin 3, but that might be through a charged capacitor somewhere else since it starts low and goes up in about 2 seconds.Leave a comment:
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Re: Dell SP2008WFPt no picture
Correct.
But isn't that the same test as in post #10?...Leave a comment:
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Re: Dell SP2008WFPt no picture
I don't get anything (0V), which doesn't suprise me since the input pin doesn't show anything when tested with the ground....Leave a comment:
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Re: Dell SP2008WFPt no picture
Those pins are in reference to my picture above right?
I get 5.23V between pin 1 and pin 3 (the configuration you asked for) and 5.04V between pin 2 and pin 3....Leave a comment:
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Re: Dell SP2008WFPt no picture
Did some more investigating.
See attached picture.
Point 1 has 5.27V, point 2 has 5.07V, point 3 has 0V.
Point 3 then goes to a fuse (blue box) and to a test point.
It then goes into a capacitor and into the input of the big regulator.
The output of the regulator is connected to the other side of the capacitor and to the ground.
The small box on top (with point 1, 2 and 3) is too small for me to read the text on top, but is labelled Q308 on the board....Leave a comment:
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Re: Dell SP2008WFPt no picture
That's also what I though.
I still get 0V on all pins.
I compared with the other regulator and that one is still working.
EDIT: Is is possible that this regulator is there for the USB hub, in which nothing is plugged right now, explaining the lack of voltage in there?...Leave a comment:
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Re: Dell SP2008WFPt no picture
Indeed, I misread your previous post.
Which one is the input pin?...Leave a comment:
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Re: Dell SP2008WFPt no picture
Is this a component that fails fairly often? As in, is there a good chance that this is the problem?
I'm pretty sure I can buy a replacement locally and change it....Leave a comment:
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Re: Dell SP2008WFPt no picture
I tested all I could find (over 15) and they all worked fine (continuity)....Leave a comment:
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Re: Dell SP2008WFPt no picture
BRI: oscillates between 0 and 2.7V every 0.5 seconds
ON-OFF: 0.12V
A-EN: 0.12V
A-DET: 0V...Leave a comment:
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Re: Dell SP2008WFPt no picture
I don't get anything on any of the pins.
It's a 17-33L like the other one.
One thing I did notice with the VGA cable plugged into my laptop is that Windows does recognize the monitor:...Leave a comment:
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Re: Dell SP2008WFPt no picture
Here are the readings I get:...Leave a comment:
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Re: Dell SP2008WFPt no picture
No, nothing at all....Leave a comment:
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Re: Dell SP2008WFPt no picture
Yes, you can see it in the 6th picture. If you check the imgur files, the resolution is high enough to see it.
The picture is upside-down, but the order is:
OFF | BRI | ON-OFF | A-EN | A-DET | GND (4) | +5V- RTN | 5V (4)
I already checked that the 4 5V pins do have 5V compared to the 4 GND pins....Leave a comment:
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Dell SP2008WFPt no picture
I have a used Dell SP2008WFPt 20 inches monitor with USB hub and webcam that doesn't work anymore.
When I plug it in, the power button light blinks blue, but pressing it doesn't do anything.
I disassembled it and took pictures of the two boards. I tested the power supply board (yellow-ish one) with my multimeter and the +5V points do indeed output 5 volts when the power cable is plugged in.
On the other board, I haven't tested the points because I don't know what any of it does. I did look at all the capacitors and they all seem fine to me.
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