Dell U2713HM randomly loosing video

The Lurker

The Lurker

Fully [H]
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Jul 1, 2001
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I bought a refurbed Dell U2713HM a while ago and it has been flawless up until 2 weeks ago when it started to randomly shut off. When I say shut off I mean the video would momentarily disappear and re-appear. Sometimes it would happen once in 10 minutes. Other times it could happen several times in a minute. I have it plugged in over display port to my T430 and this is what I have been able to establish.

1. When it happens the system does not make any noise to indicate it has disconnected.
2. Event viewer does not indicate a driver malfunction. In fact I have a second monitor running off this machine and it continues to function normally through the event.
3. I have updated the video drivers just in case.
4. During the event I described the monitor does not indicate that it has lost signal or display the port that is being used afters its turned on and off manually.
5. Using the power button to turn the monitor off for 10 second and back on, helps alleviate the issue for a little while.

I feel like it may be the power supply in the monitor that's screwing up. Kind of like the random reboots you get on a computer with a faulty power supply.

Anyone have any thoughts on this before I open it up?
 
MoFoQ said:
Does it power off?
It could be bad crappy caps
Click to expand...

Maybe it does or maybe it doesnt. The screen goes black for a second and then pops back on. I dont think its powering off because even a momentarily loss of power would make windows chime that a device has disconnected and it doesnt do that.

I have been trying to spot the light on the power button when it happens and I think it dims momentarily but it could be my eyes playing tricks on me now.

I was thinking bad caps too, which is why I am thinking PSU and it would be pretty easy to diagnose. But honestly a completely failure would be even better.
 
Doesn't sound like it is the cable, just for the hell of it, I would try a different power cord and different video cable. Use an HDMI or dvi input if you can to help diagnose. But it doesn't sound like that would be your problem.
 
Good ideas. Ill start with the power then try DVI instead of DP(i dont have another DP cable).
 
This is strange. After I made this thread the issue went away the next day. WTF!

Now watch them return.
 
It'll come back. I had a 22" del monitor that did that to me. It stopped for like 3 weeks then came back with a vengeance. I ended up just throwing it in the trash.
 
You were right. After I made the thread came back hard, several cycles of blank screens in a minute then totally fine. Today its been fine too.

I am going to take it home tonight and take a look at the PSU.
 
Believe it or not it was the mini display port to display port cable.

Before I took it home I tried another cable and it stopped losing video signal sporadically. I didnt think it could be possible but I guess the daily plugging/unplugging took its toll.
 
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