Question about Dell UltraSharp 1905FP 19" LCD Monitor

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Dell 1905FP powers up but screen goes black after a few minutes

Monitor powers up long enough for computer to boot, then the screen goes black. Sometimes the screen flickers slightly before this happens. When I lose the video I will see faint colored vertical lines that dissolve into black. The power light remains lit. If I turn off the monitor and power up again I will have video for a few minutes more. Any thoughts on what the problem is? Thanks.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: Dell SP2208WFP Flat Panel Monitor flickers out and goes black.

Hi again,

Any luck with the Dell people?

A favor if I may, at your convenience, would appreciate if you can rate our Live Session as you see it fit.

Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Aug 06, 2008

  • 1 Answer

SOURCE: LCD monitor turns off after 2 seconds from boot

Thanks for the suggestion, I have finally found out that the back light for the monitor is culprit. Also dell people and confirmed it . They aggred for a replacement. Thanks for the suggestion again.

Posted on Nov 25, 2008

  • 11 Answers

SOURCE: Screen goes blank

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Cause of power going off: There is a bad 1000uF, 16V cap on the power supply board.

Solution: Replace cap. Radio Shack sells a 1000uF, 35V cap for $2. This will work.

Why did the cap go bad? The cap is too close to a heat sink and over heated.

What does this cap do? This cap sends a signal to an IC which keeps the monitor 'on' after the power switch is pushed. When the cap is weak, AC ripple voltage is applied to the IC and it sends a signal to shut the monitor off.

Opening the Monitor: These monitors are difficult to open.

The two plastic pieces snap together and must be pried apart with a flat screw driver.

After removing the stand, you need to insert a flat screw driver at the bottom of the screen where two slots are located. Then work the screw driver around until the two plastic pieces are separated.

Remove the cover plate and unscrew the push button circuit board.

Unplug the monitor cords from the driver board and remove the screen.

Unscrew the mounting screws from the power supply board and remove.

You will need to pinch the plastic support in the middle of the board to remove.

Cap Replacement:

Cap is located near a copper heat sink and the value will be on the side of the cap. It will be bulged up on the top. You will see burn marks on the board surrounding the cap. Unsolder the cap.

Install the new cap and solder. Make sure you connect + of the cap to + marked on the board.

Be careful not to solder across joints.

Keep leads long so you can bend the cap as far away from the heat sink as possible.

Reassemble monitor and turn on.

This should solve the problem.

Posted on Jan 01, 2009

tommya300
  • 724 Answers

SOURCE: blank screen, flashing green light

Internal power supply is hurting. It is a non linear supply and they switcher transisters are not working

Posted on Jul 27, 2009

  • 1684 Answers

SOURCE: Dell E172FPb monitor black screen green flashing power button

Hello,

We have a dis-assebly and repair guide posted on our web site at:
www.ccl-la.com/monitor_repair.htm
The problem is usually the driver transistors, our guide shows where they are and what to replace to get your monitor back running again.

I hope this helps, If so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com

Posted on Jul 30, 2009

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9_24_2012_11_00_25_pm.jpg

http://www.ccl-la.com/blog/index.php/repairing-a-dell-1905fp-1907fp-lcd-monitor/

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