Question about Dell E173FP 17" LCD Flat Panel Monitor

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Repeated power cycles after a couple of hours running.

I've got a Dell 17" flat-panel monitor and it repeatedly power cycles when turned on. It seems to work fine for a few hours and then begins the continuous power cycle. Any thoughts on this one? I almost completely dismantled the monitor to see if there were any loose or damaged cables and put it back together and it still seems to do this. Almost like something is overheating? The power supply? Can these be replaced at a reasonable cost if so?

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Re: Repeated power cycles after a couple of hours...

I have a Dell 15" Flat Panel with the same symptoms. I found that if I tapped on the monitor, it would work for awhile which suggested a loose connection. I dismantled the monitor and removed the main board so that I could see the soldered connections. With the board positioned with the power connection facing away from me, I inspected all solder joints on the main board using a magnifying glass. On the left side, I saw two capacitors and found insufficient solder around the leg of one of the capacitors. I touched a soldering iron with a small dab of solder to the connection. After reassembling, I have experienced no further cycling. Going on two weeks now, it seems to have cured the problem.

Posted on Feb 09, 2008

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Re: Repeated power cycles after a couple of hours...

Before it goes out, does the picture compress on one of the sides? it's possible the horizontal output transistor is overheating. this is usually caused by a dried out electrolytic capacitor in the driver circuit. if you're not sure what i'm talking about, have it repaired. if you understand what i just said, i'd be glad to help you find the problem.

Posted on Jun 28, 2006

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SOURCE: Dell E173FP 17" Monitor

I just had the same problem as well - mine happened during a windows update, related? Also, for me the monitor doesn't come one even after disconnecting from computer, nothing, just blinking green light.

Posted on Nov 21, 2007

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SOURCE: Dell 1800FP Dark, No Power but power supply seems fine. Help!

I just repaired 3 1800FP's - all dead, no lights.
Firstly a dead 2AS01 is 95% of the problem, because some fool designer left out the protective zener diode - cheapness.
Mouser Electronics does not have this part, but lists it at 37 cents in lots of 2500, and gettable at $2.66 somewhere else.
You must also replace the two small value electrolytics near this IC, as some had an ESR of 40 where <0.5 is where it should be.
I suppose as the electro's dry out, the spikes can zap the IC. The quacks on ebay flogging 2sa01's alone, probably hope to sell you another one down the track (at a fat markup).

There are 2 'Sam Young 2200uf' electros that really should be replaced, with ESR or 2-30 ! Ideally replace ALL electros, as the others will be off - but those 4 as a minimum and using a jewelers loupe, resolder other joints on the transformer and anything that looks more dull silverish, than the rest. A 1 inch used and worn paint scraper will get the case open easy.

DANGER, CAUTION : Finally when refitting the inverter board, ensure the steel tab is over the TOP middle of the board facing away from the power socket (SO YOU CAN SEE IT) . The board sides in flat. It is possible to scew the board down with a slight bend, with the tab pressing over the pcb tracks - very , very bad!

Now all I need is for some kind soul to improve the fix by stating what the value of the missing zener should be.

PS. Just because the caps are not bulging does not mean they should be OK. Most wrecked 10 year old power supplies have better ESR's, so the electronics must be hot under the cover.
I have seen bulging caps with a GOOD ESR, and non bulging ones with an ESR of 47.


Posted on Aug 28, 2008

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SOURCE: Dell E173FPc 17" TFT when turned on goes black

Hi Gaz,

First, verify the monitor is functional.
Monitor STFC (Self Test Feature Check)
Turn off the monitor
Plug the monitor power cord directly into the wall socket to remove any surge protectors or APCs from the troubleshooting equation
Unplug the monitor video cable from the back of the computer
Turn on the monitor
The floating dialog box should appear on screen against a black background.
If the issue appears during the STFC, the monitor is defective. What are the results please?

Posted on Feb 24, 2009

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