How to repair a Dead Dell 3008WFP Monitor

[embalse]

I have a Dell 3008WFP vA02.

If you wake up one morning like I did to find your monitor has no power. It is most likely because the diode D22 has blown. This is becoming a common problem with this model especially around the 4 year mark.

The part only costs under £3 pounds to replace so here is a “step by step” of how I repaired mine. I hope this helps others as this monitor is too expensive to throw out.

Thanks to Banano and all on this thread who helped me.

http://forums.overclockers.co.uk/showthread.php?t=18444760

Also thanks to those over at badcaps who have a long thread on the subject.

http://www.badcaps.net/forum/showthread.php?t=14195


These videos will also help, but he makes getting the bezel off easy which is not the case.

https://www.youtube.com/watch?v=89Z8-eYknmc&feature=relmfu

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


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You need to buy a STPS60170CT diode. You can get one from here..


http://uk.farnell.com/stmicroelectr...e-schottky-2x30a-170v/dp/1295334?Ntt=129-5334


The hardest part for me was removing the bezel. It is a real pain, but it does come off.




File down an old credit card on one edge so that you can pry away the bezel then use any other suitable tool to help. I used a bicycle lever.
When you have separated the bezel be careful because the power on/off is connected to it so do not seperate too much.




Place some card at the edges to keep the bezel separated then turn it over. Again be careful when turning as the screen is no longer held in place.




Once turned over you can remove the back. Gently lift over the sockets and the whole back should come off. You then need to remove the metal backplates which are secured by screw's and tape.




Remove the power connector lead (use a paper clip to pull the two brown levers on each side then it should pop out), then remove the inverter plug.






Gently lift up the main backplate which holds the power board. There are two sockets that need to be disconnected before you can completely take it off.






Once off turn it over and you will see the power board.




Remove the 4 screws that hold the power board at the back and the 5 screws that hold the board at the corners.






Lift it up (It might be stuck so you may need a bit of force) but be careful as it is connected by 2 sockets that need to be disconnected.






Now you have the power board separated, you need to remove the heatsink to gain access to the diode D22.




Remove the 2 screws on the top.




The heatsink is now connected by two corner solders and 2 diode's. These all need to de-soldered from the power board.






Warming the board first with a hair dryer before de-soldering helps a lot.

De-soldered joints.




Heatsink removed




Where the heatsink was connected by the screws Dell has some kind of thermal paste. I removed this before removing the diode.




The diode D22 is clearly marked on the board. It needs replacing with the STPS60170CT diode.




You need to unscrew the diode from the other heatsink and de-solder it from the power board. Replace it with the new diode. Clip the ends to the right size and solder.






The old and new diode.




And..... you are done, well nearly.

Not sure what the paste was on the heatsink but I used CPU thermal paste, before putting back the heat sink. Solder back the heatsink and the 2 diodes that you removed.









Put back the monitor back plates etc and …. You have your monitor working again.




Good luck.


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[embalse]

Very much appreciated mate, I imagine that at some point I'm going to have to do this. Part of wonders if I should just but the diode and due it now rather than wait for it to go.

If I had any sway I'd ask for sticky.

If it "ain't broken don't fix it".
Hope you don't have to fix it, but if you do at least there is a solution.

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[embalse]

Hey Embalse, I acquired one of these monitors for next to no money at all. In the repair process I got the monitor to live for about 30 seconds but it died. Can you recommend either where I could find a new power supply? Or someone with better soldering skills than me as I'm hopeless :/

Did you manage to replace the D22 first?

The problem with replacing the Power Supply is that it will come with the original diode D22 which means that at some point it has a high risk of blowing again.

It would be worth practicing soldering on some old boards before soldering the D22.

 

[embalse]

I did indeed replace the D22, however it only functioned for about 30 seconds then died again.... Any idea where I might be able to pay for soldering expertise?

Sorry to hear you had no luck replacing the diode.

It could be that your soldering did not connect to the board properly so it is worth trying again, before looking for a new Power Supply.

Any local computer/TV repair place should have a person who can solder if you feel you cannot try again.

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[embalse]

If it's any help I used a...

WELLER - W61 EU - SOLDERING IRON, TEMP CONTROL, 60W
DURATOOL - SOLD0001 - SOLDER WIRE, 60/40, 6M, 22SWG
DESOLDERING BRAID (Better than Desoldering Pumps at least for me)

 

[embalse]

My Dell 3008Wfp went dark about 3 weeks ago,

Hey D_Monolith, glad to hear you got it working and that the guide was helpful.


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[embalse]

I cannot see Dell ever admitting fault, then again stranger things have happened.

 

[embalse]

I joined up so I could thank the OP and others for posting this thread. My second Dell 3008 died last week, the first was replaced under warranty but this time I was on my own.

Glad to see you got it sorted.

 

[embalse]

Thanks for the feedback.
It's been nearly 3 years since my OP and my Monitor is still going strong, so well worth doing.

 

[embalse]

thanks for this guide!
just a quick question -- the original diode had a ceramic black ring on its third leg (a jumper or something?), does the replacement diode need one of those or just put it in as is?

Does it come off the old diode?
It's been many a moon since I did mine so I cannot remember whether it came off of not. If is does put it on the third leg of the new diode. My guess is it does not come off as I would have mentioned it in my original post.


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[embalse]

didnt come with the new diode

i tried to take it off the original but it was glued and i only ended up crushing it.

That make sense as I would have mentioned it in the O/P. Just solder the new diode in place and you should will be good to go, but wait a bit hopefully someone who has repaired one recently will chime in and confirm one way or the other....



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[embalse]

put in the new diode as it was (no extra bits), my soldering job was pretty poor so half expecting to have bodged it up, but its back on & working like a charm..

thanks again for this guide! i've got 2 of these monitors, so expecting the other one to do the same at some point too..

Great!! Glad it worked

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[embalse]

Hi. I'm from the Netherlands, and just joined to say THANKS to Embalse and all people who found the real solution to this problem! My 3008WFP died just over 3,5 years ago, after about 5 years in service.........................

Hey glad you fixed it.
Thanks for contributing and sharing. Great pictures!!




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[embalse]

As with everyone else, I am indebted to Embalse and others who discovered the problem and documented the remedy so completely.

As an electronics design engineer with some 40 years experience, I can perhaps shed some light on the deeper technical details of the fault and the repair........

Hey, Thanks for the detailed explanation regarding this issue.


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[embalse]

Thank you so much to Embalse and all the other people who contributed to this solution.

My monitor is working perfectly again, I didn't dare to do the soldering job, but dismantled as indicated and took it to a technician, cost me 10€ plus the 15 for the diode, i still got 3 of them if someone need it, please let me know.
The most difficult part was removing the front frame, i started from the right bottom corner where the buttons are and ones that was off enough I could juts use my fingers without any tool to opening entirely.

Otherwise really happy to have resuscitated my monitor!

Cheers
Daniel

Glad you got it sorted!

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[embalse]

Can't believe it has been over 4 years since I did the DIY fix! I originally purchased it from OCUK on 11th Sep 2008 for £809.10 (still have the invoice), I think I have got my moneys worth, sure it gets hot and has some dead bugs stuck inside it but I just can't get rid of it until it actually dies!

Same here. Having repaired it in 2012, mine finally "met its maker" this year, so that's pretty good. Am currently looking for a new monitor.


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[embalse]

Hi all,
I might have one of the oldest 3008WFP - (Rev AO1)

Good luck. With patience, it should be an easy fix.

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