Question about Dell E173FP 17" LCD Monitor

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Monitor does not turn on

I have 17in apple studio display monitor, was working fine for years now all of the sudden just went blank can not turn it on, seems like there is no power in but computer has power cable are connected, I don't know

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  • aarachika Nov 19, 2008

    tv having problem,onn for a while with buzzing sound then off. i isolated the h.o.t section no buzzing sound
    primary supply is normal.connecting a 75watts bulb after isolating the h.o.t
    bulb glow up with full brightness.may i change the h.o.t,may i use another h.o.t from any other tv



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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 goingoff: There is a bad 1000uF, 16V capon the power supply board.

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

Why did the cap gobad? The cap is too close to a heatsink and over heated.

What does this capdo? This cap sends a signal to an ICwhich keeps the monitor 'on' after the power switch is pushed. When the cap is weak, AC ripple voltage isapplied 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 apartwith a flat screw driver.

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

Remove the cover plate and unscrew the push button circuitboard.

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

Unscrew the mounting screws from the power supply board andremove.

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

Cap Replacement:

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

Install the new cap and solder. Make sure you connect + ofthe 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 theheat sink as possible.

Reassemble monitor and turn on.

This should solve the problem.

Posted on Jan 01, 2009

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Chances are 1.broken supply cord
2.check fuse
3. in the power supply section please check the capacitors around primary hot
supply,or physically burned parts.
4. h.o.t transistor may short.
5.horizontal output transformer damage.

Posted on Nov 19, 2008

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