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Doing a screen replacement on surface pro 3. Everything was working, new screen came in and I went to test everything, how ever when I plug the battery it makes a loud high pitch noise and I don't know why. All connectors are the right way but moment its plugged in I get this noise. Any ideas or thoughts would be greatly appreciated.
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Just posting a random solution out here I discovered myself in case it is any reference.
Just copy pasting here: The monitor was moved closer to where I am sitting and its high-pitched (probably coil) whining/squealing was rather audible.
It was originally just powered through a power strip (nothing special there). And connected to my desktop GPU via DP. However, I noticed that miraculously, after I connected the monitor to my computer (with USB-A to USB-C, but USB-C to USB-C probably works), the whine stopped. (This USB port is for allowing you to feed data back into the computer when you connect something like a keyboard to the monitor.
Probably something about... closing the ground loop happened. Maybe something like off voltages. Maybe the USB simply allowed the excess something to flow out via a ground. I don't know. But whatever it is, hopefully others will find this solution useful!!!
Now that the whine is gone, I'm so lucky I got this to get fixed and go away. My original plan would have been to open up the monitor and get some type of pastes or poster board putty and stick it on the source of the whine. I only now notice how incredibly annoying it was.
So basically.. the story is that it could get complicated. But try various ways of connecting and grounding the item, I guess. If I tried to pretend I knew what might be the problem, it's that basically the power input is kind of unbalanced. Let's say too high or too low. And the way the circuit was designed ends up causing some components to just have too much of something dumped on them.
(This sounds like coil whine is bad for the device, but from what I've searched in the past, it's harmless and is a cosmetic/annoyance thing)
And then somehow you can try to let the device ground itself. I dunno.
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2 commentaires
Did you make sure battery was not connected before unplugging or plugging in LCD cable?
Have you made sure those weird socket pin bridge connectors are there and not missing for battery and lcd contacts on the board?
Made sure they align with connector and board pinouts?
par Ben
yes I did. I had the tablet off, pulled battery first and put heat tape of the the small board pinouts so they would stay in place and not move. I did one on Friday just fine same model and everything.
par The Screen Spot