Dell 3007wfp No Image

[S. Bouchard]

Re: Dell 3007wfp No Image

OK, on pictures 1, you have black rectangular showing the two pin line up, but the third picture, the two pins are offset so I am confused as to what I am seeing, The solder joint of the bottom connection (round pad) on picture #3 looks bad too me.

In picture #1, you are seeing the post and above it is where the trace was slightly exposed and where the spark / short jumped across and further exposed / damaged that trace. In picture #3, I agree that joint looks bad but if you look at the new picture is looks fine. I think lighting / reflection / angle or something made it look that horrible.

Here is a new picture showing the post and the damaged / exposed trace above it.

What could have caused the current to jump there? What do I need to do to remedy this?

[budm]

Re: Dell 3007wfp No Image

That was high current arcing, enough to melt copper. May be there was piece of wire or metal object under the board that shorted out the two traces?

[S. Bouchard]

Re: Dell 3007wfp No Image

That was high current arcing, enough to melt copper. May be there was piece of wire or metal object under the board that shorted out the two traces?

When I removed the board, I noticed Thermal Paste which had smeared under the board (I didn't notice it when I re-assembled it). It wasn't much but that's the only thing I can see. The paste was Arctic Silver 5 which is not suppose to be electrically conductive but the manufacturer does state it can be slightly capacitive. If it was that, the monitor had been on for about 72 hours so ... what do you think?

Is it safe to re-assemble? Should I look for something else? This happened right in that snuber circuit you described. Coincidence?

Do I need to cover this exposed copper trace? What do you recommend I use?

[budm]

Re: Dell 3007wfp No Image

"electrically conductive" there may be contamination?
I do not know but what ever it was, it conducted enough current to melt copper, you can put clear finger nail polish on the expose copper or just leave it, there is enough electrical clearance between the two traces.

[S. Bouchard]

Re: Dell 3007wfp No Image

there is enough electrical clearance between the two traces.

That's what I thought ... I'll add some clear nail polish on it. Make sure the board is ultra clean and re-assemble. It's kind of scary not knowing what exactly caused this. I can't help but think I got lucky that it didn't blow up any parts.

[HAHOMETP]

Re: Dell 3007wfp No Image

I'd like to thank Mr. S. Bouchard for the excellent post that pointed me right to the burnt fuse in the T-Con board and allowed me to fix this monitor in record time.

Just as S. Bouchard I have replaced all of the capacitors in the PSU of this monitor as a preventive measure once I had it opened up. Also I have compiled for the archives and attached below a table with all of the polarised capacitors in the PSU along with their replacements with DigiKey part numbers and current prices. In this table you will also find the actual values of the capacitors measured with my Wavetek 2030. While I measured each and every original capacitor from that board I only bothered to measure one capacitor from each new batch of the same value.

The capacitors are grouped by value and then sorted by their silkscreen numbers within the group. Also please note that C232 and C242 have the same value but different working voltages. I didn't bother to follow this arrangement and elected to order two identical capacitors with the highest of the two voltage.

I hope somebody might find this information useful.

[seanbarman]

Re: Dell 3007wfp No Image

Hi I have a dell 3007 wtp if you switch it on it runs through the color cycle test fine, but when i connect to pc image is disstorted, its not cables or pc as i have test with a 3008 wtp
is it fixable ?

[F4LL0U7]

Re: Dell 3007wfp No Image

Hello everyone, this is my first post here. I stumbled across this thread while trying to figure out what's wrong with my Dell 3007. It's pretty crazy -- the problem S. Bouchard described in his OP is exactly the same problem I'm having.

The difference is, I have absolutely zero experience repairing electronics. After reading the steps taken to repair this issue, it seems way too advanced for me.

As if by some stroke of magic, user HAHOMETP from Philadelphia posted a few months ago that he also had the same problem, and fixed it using Bouchard's tips.

Well Mr. HAHOMETP, I am also in Philadelphia. I would gladly buy you a case of beer, or a bottle of your choice, and several cheesesteaks if you'd be willing to give me a hand with fixing my monitor in person. Or I could also just pay you.

I'd PM you, but I'm a new user and can't do that. Hopefully you have notifications enabled for this thread. If someone else sees this post, could you please do me a favor and PM HAHOMETP on my behalf?

I'd be eternally grateful to this site and its users if I could get my monitor working again.

Thank you so much in advance.

-Ted

[HAHOMETP]

Re: Dell 3007wfp No Image

An email sent to Ted

[ped90]

Re: Dell 3007wfp No Image

Hi there.
This is my first post. Sorry to bring up an old thread here. I just wanted to start by saying thanks to all who have contributed to this thread. It's helped me a lot!
I'm just replacing the caps on my power board too. I'm wondering if anyone has an answer to a question that was asked in this thread a while back:

Another question.

In taking inventory of the capacitors on the power supply board, I came across a Taicon 4.7uf 50v 125c capacitor. Most premade kits show a 47uf instead. What gives?

Thanks (I hope someone see this)
Ped

[viziks]

Re: Dell 3007wfp No Image

If you are referring to C007 it is shown as 5 uf by HAHOMETP. See the list of capacitors posted by him.

[Magrathea]

Re: Dell 3007wfp No Image

Can anyone tell me what the value is of C171 in the PSU, it had burnt out in my monitor and blown the fuse, only 22 and 1kV remained, I guessed at 220pF but the screen flickers and the brightness is low with this value, I'm reluctant to experiment with values incase of damage but would guess 22pF is the only other choice given the size of this ceramic disc? I guess I could have another fault.

[jshippy]

Re: Dell 3007wfp No Image

Hey guys I just want to say thanks for this thread - S. Bouchard & Hahometp are superstars! I picked up one of these monitors used for $40 without being able to test. Got home and had all the symptoms described in the first post. Replacing fuse F1 and replacing all of the caps on the board (i bought all items from Digikey for about $20) and the monitor is up and running. Now i'm just waiting on my Dell KDP70 so i can connect this to my main system.