All,
I do not have pictures yet as I have not started troubleshooting the monitor by taking it apart.
The problem is the monitor randomly appears to power itself off and then after a random delay comes back on by itself. Splashes the Dell logo on the screen and starts displaying the image again a few seconds later. During this time when its having its fit the light in the power switch goes off. Most of the time the delay to power back up is in the range of 2 ~ 10 seconds. But in a couple of instances it has stayed off for at least 2 hours at which point I just unplugged the power cord. A day later when I plugged it back in it started working again.
When the monitor shuts itself off, hitting the power switch does nothing. Also when the monitor is having its fit, the power on its USB ports and the power for the audio bar stays on.
So far I have owned 4 dell Ultrasharp monitors. This U3011 and three 2007FP. every single one of these monitors developed this exact same problem once outside the warranty. On the 2007FP the problem very rapidly got worse until one of the DC-DC converters (5V that feeds the main board) on the USB board would die. After fixing the USB board the monitor would work fine for a couple of months, would develop the same problem again and would die again. In my last attempt to fix them, I repaired the USB board and also replaced the main board from monitors with busted screens and all three of the 2007FPs have been running fine for the last 6 months (except one has a problem that it never goes into power save mode - a problem that it inherited from the donor monitor.)
On this U3011, the problem is not getting worse or if it is its at such a slow pace that it is not noticeable. Problem is certainly worse when the ambient temperature is high but it still does happen even when ice cold air is being blown directly on the monitor with its back plastic cover removed.
I would like to hear from anyone that has attempted to repair this monitor or a similar one of their experience. I have taken the monitor apart a few times already so I am not looking for general tear down information. But would certainly like to hear from someone that has attempted to repair the DC-DC converters on the main board of this monitor.
And if someone happens to have the schematic, that would be awesome.
Thanks,
Shahid
I do not have pictures yet as I have not started troubleshooting the monitor by taking it apart.
The problem is the monitor randomly appears to power itself off and then after a random delay comes back on by itself. Splashes the Dell logo on the screen and starts displaying the image again a few seconds later. During this time when its having its fit the light in the power switch goes off. Most of the time the delay to power back up is in the range of 2 ~ 10 seconds. But in a couple of instances it has stayed off for at least 2 hours at which point I just unplugged the power cord. A day later when I plugged it back in it started working again.
When the monitor shuts itself off, hitting the power switch does nothing. Also when the monitor is having its fit, the power on its USB ports and the power for the audio bar stays on.
So far I have owned 4 dell Ultrasharp monitors. This U3011 and three 2007FP. every single one of these monitors developed this exact same problem once outside the warranty. On the 2007FP the problem very rapidly got worse until one of the DC-DC converters (5V that feeds the main board) on the USB board would die. After fixing the USB board the monitor would work fine for a couple of months, would develop the same problem again and would die again. In my last attempt to fix them, I repaired the USB board and also replaced the main board from monitors with busted screens and all three of the 2007FPs have been running fine for the last 6 months (except one has a problem that it never goes into power save mode - a problem that it inherited from the donor monitor.)
On this U3011, the problem is not getting worse or if it is its at such a slow pace that it is not noticeable. Problem is certainly worse when the ambient temperature is high but it still does happen even when ice cold air is being blown directly on the monitor with its back plastic cover removed.
I would like to hear from anyone that has attempted to repair this monitor or a similar one of their experience. I have taken the monitor apart a few times already so I am not looking for general tear down information. But would certainly like to hear from someone that has attempted to repair the DC-DC converters on the main board of this monitor.
And if someone happens to have the schematic, that would be awesome.
Thanks,
Shahid
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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