Introduction: Dis-assembly and Repair of a Dell E173FPf Monitor

Picture of Dis-assembly and Repair of a Dell E173FPf Monitor

There are many Dell E173FPf monitor in use and many will have power supply issues. If this Instructables guide we will show you how to dis-assemble the monitor and replace the parts needed to repair the most common problem - the blinking power led or no power at all.

To do the repair you will need the following tools:
Soldering iron, de-solder braid, Phillips screwdriver, flat blade screwdriver.
You will also need the following electronic parts: qty(2) 220mf 25v capacitors.

We have repair guides for other LCD monitors on our site at

If you don't have a monitor to repair check, you will find them for sale usually for less than $30 in as-is condition, just be sure the screen is not cracked.

This is not guaranteed to solve all problems but in most cases this is the issue with this model.

Step 1: Getting Started in the Dis-assembly

Picture of Getting Started in the Dis-assembly

The first thing to do is remove the power and signal cables. Then remove the monitor stand by unscrewing the four Phillips screws shown circled in yellow. When the stand is off you can remove the back case by inserting a small flat blade screwdriver in the slot on the bottom. The case has a few plastic catches that need to be released. Gently pry the two halves apart and just work your way around the case separating the 2 pieces. After the case is seperate remove the monitor and set the case halves to the side for later reassembly

Step 2: Getting to the Electronics

Picture of Getting to the Electronics

Once the plastics are removed we need to remove the metal shielding so we can get to the electronics. Start by removing the 4 screws, 2 on each end and the display. Next unplug the LCD panel from the electronics and unplug the backlight tubes(white and pink 2 wire plugs). Last thing is to unscrew the power and signal plugs from the metal shield.

Step 3: Board Removal and Repair

Picture of Board Removal and Repair

To remove the board you need to unscrew the 7 screws marked by yellow circles. Then unplug the front control panel from the board. The normal problem on this model LCD in the 2 capacitors in the backlight inverter circuit. The 2 capacitors are circled below. The capacitors are 220mf 25v electrolytic caps. You can look at the board and see the tops of the caps have a bulge on them, this is a sure way to tell they are blown. It is very surprising to see how many different brands of monitors can be repaired by just replacing a few capacitors. When you insert the replacement capacitors be sure to line up the polarity stripe on the cap the same direction as the old cap came out.

Step 4: Re-assemble and Test

Picture of Re-assemble and Test

If everything went ok you can now re-assemble your monitor and test it. You should now have a good working monitor that will last a few more years and keep a dead one out of the landfill. If you have questions just email me. Be sure to check our web site at for repair information on other brands and models of LCD monitors.

Good luck and good repairing!


mrfcricket (author)2009-08-10

Where exactly can i buy the capicitor - 220mf 25v electrolytic caps.

mzdave (author)mrfcricket2014-10-05

amplex (author)mrfcricket2011-01-21

Mouser Electronics, has possibly the best and most up to date selection of current electronic components. has great prices usually!! Although their catalog is not nearly as complete as Mouser.

cclla (author)mrfcricket2009-08-11

Hello, We have the set available for purchase on our web site at: click on monitor repair guides and then the model you need such as the E173FP You can also order them from several places on the internet but most have minimum order qtys

sgtjasonshrout (author)2014-06-07

Update: yes!! It's fixed! I wound up salvaging 2 capacitors of of an old motherboard. The voltage was the same, but the capacitance was more than twice what was originally built in. All that I can do is hope that it is able to handle it.

sgtjasonshrout (author)2014-06-07

This was exactly what I was looking for CCLLA! A very professional solution with documentation and visual aids! Whether or not I am able to fix my monitor, you taught me how do do it. Sincerely... Thank you!!

ketorolac (author)2013-12-16

Your site is blocked, says it has malware...

ketorolac (author)2013-12-16

Hello, is there any chance of electric shock? since the wires pink and white are high voltage

gweeds (author)2013-06-24

I'd love to have a look at the web site mentioned in this instructable, but Chrome keeps reporting that it drops malware, are you aware of this?

sctirvn687 (author)2010-07-09

I found a 17" Sceptre monitor. When turned on it emits a high pitched sound, the back light comes on for probably 2 seconds each time the power switch is pressed. I took the board out and it looks like the little doo-dad (technical name) that I circled in the picture overheated and made a burn mark in the circuit board. Any ideas? Thanks.

jtechian (author)sctirvn6872013-06-23

That component is a mosfet transistor that looks sorted, replace that with same number and also the cap that shows the end bubbled out. good luck on the fix.

Instructi-Guy (author)2010-10-11

I hate these darn things. My cord is acting weird and is showing things in a purple hue. Errrgh.

amplex (author)Instructi-Guy2011-01-21

When this happens, usually the cable is not plugged in all the way. (check the back of the pc where the VGA/DVI cable plugs in. If its a modular cable (has another end that comes off on the monitor side) check that connection too.

jfbjfb (author)2010-06-21

OK, works fine with only 2 new caps ! Thank you

gusg (author)2009-08-25

220uF is the current standardised way of writing 220 micro-farads. The old mF was dropped a long time ago. That threw me a little when I was searching to buy the caps. 220uF 25v caps are very common.

lemonie (author)2009-07-26

Thanks for the info - do you have any experience with TV disassembly? L

cclla (author)lemonie2009-07-27

We do have some service manuals. What model are you looking for?

lemonie (author)cclla2009-07-27

I was just thinking how TVs used to be repaired more often, a transistor or like these monitors a cap'. It's one of those things that doesn't happen very much, and of course TVs and monitors are quite similar. L

cclla (author)lemonie2009-07-27

Yes, Older monitors and newer TV both have basically the same type power supplies. We have repaired flat panel TVs that have the same problem as this, just a capacitor or two. The parts are cheap if you do it yourself but can be expensive if you call a repair center. It really is amazing that a lowly little part like a capacitor or transistor can kill so many different types of products. I can put together some dis-assembly guides if you think they would help others.

lemonie (author)cclla2009-07-27

What would interest me personally, is how you identify the defective components. OK, if they're obviously bulged or blown it's easy I suppose. L

cclla (author)lemonie2009-07-27

How about a guide on how to test capacitors and transistors? That is usually what goes out in the power supplies. Some capacitors can be bad but not bulge so they make it very had to find visually. Buddy

lemonie (author)cclla2009-07-27

It would be useful - do it? L (I have plenty of assorted old transistors, I don't know if they work, I only know if the circuit doesn't work..)

christophor (author)2009-07-26

You have no idea how happy I am to see this instructable! I'm trying to use one of these monitors to build a touch screen to spruce up an old server rack I use at home. I couldn't figure out how to get the plastic off of the monitor without scratching things up. This helps a lot. Thanks for posting this. - Chris

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