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Repairing Dell U2711 Display Flickering Panel due to corroded Contacts

简介

The Dell U2711 Monitor has a problem with unstable contacts due to corrosion. The symptom is a flickering screen. Knocking on the top of the monitor can make this symptom go away for a while, but a longer term solution is to clean the contacts.

The problem can be seen in this video:

https://www.youtube.com/watch?v=_En6ih88...

你所需要的

  1. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts, Unmount Display Stand: 步骤 1 中的图像 1，1

    • Lay the display on a desk with the front facing down. Best use a towel to save the desk and display from scratching.

    • Unscrew the four hex screws that secure the stand.

    编辑

  2. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 2 中的图像 1，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 2 中的图像 2，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 2 中的图像 3，3

    • Starting opposite of the buttons, pry open the display bezel with a plectrum.

    • You have to apply some force.

    • Don't lift the rear panel higher than two centimeters. There are delicate flat cables on the button side which might be damaged.

    • Be extra careful at the buttons, you don't want to damage a cable.

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  3. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts, Unplug USB Cardreader Cable: 步骤 3 中的图像 1，1

    • Unplug the USB cable of the card reader.

    • Remove the rear cover.

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  5. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts, Remove Cover: 步骤 4 中的图像 1，1

    • Remove the shiny cover in the middle.

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  6. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 5 中的图像 1，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 5 中的图像 2，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 5 中的图像 3，3

    • There are two black connectors below the cover.

    • Unplug both and treat with contact spray.

    • Plug both back in.

    • Reassemble the display.

    • You should be fine for a while. Notice that the corrorsion might return in a few months.

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  7. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 6 中的图像 1，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 6 中的图像 2，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 6 中的图像 3，3

    • Now remove the two screws of the side panel.

    • Lift the flat cables gently of the panel.

    • remove the panel.

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  8. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 7 中的图像 1，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 7 中的图像 2，3 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 7 中的图像 3，3

    • Remove the four screws that hold the main metal box in place

    • Gently lift the flat cable where it is glued onto the right side of the screen.

    • Lift the metal box from the right side

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  9. Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 8 中的图像 1，2 Repairing Dell U2711 Display Flickering Panel due to corroded Contacts: 步骤 8 中的图像 2，2

    • Use contact spray on these connectors as well.

    • Put everything back together.

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结论

To reassemble your device, follow these instructions in reverse order.

28等其他人完成本指南。

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Jeho

于09/15/15注册

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26条评论

This sounded too good to be true, but it worked for me. Start with the corner away from teh power button and really have to force it apart. Just not too far apart!

Be careful with the connectors too. I left a broken piece of plastic in my monitor.

Kevin - 回复

Worked for me too!!! Ended up with slightly chipped casing... but who cares! i now have a as-good-as-new screen image....

So glad i found this post... was initially exploring replacing capacitors method.... but didn't start..... glad i do not need to go to that route anymore.

For anyone looking for this, you should have 1) an electrical contact cleaner and 2) TORX screwdriver!!

Danny Tan - 回复

Once I took my U2711 apart, the connectors didn't look too corroded (in fact, they looked fine) but the process of cleaning them and unseating the connectors has fixed the flickering! Thanks a lot! took me about 15 minutes!

Anthony Sist - 回复

Took about 10 minutes .... first repair after having this monitor since they were first released ..... Back to loving my Dell again :)

Martin Suckling - 回复

Anyone know a way to open these w/o any damage? Mines mint and its a monitor my dad gave me before he died so I am on a mission to get it fixed or fix it myself which ever gets me the best results...

Neccros - 回复

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