Dell 3008wfp faulty power supply

[selldoor]

Re: Dell 3008wfp faulty power supply

Something else to check for is rotting lvds cable

see here - last post
https://www.badcaps.net/forum/showth...008WFP&page=12

[Th3_uN1Qu3]

Re: Dell 3008wfp faulty power supply

My experiences from the past:
1. The longer the monitor had been switched off completely, the longer it took to start up (screen remained black for half a minute).

That's a classic symptom of bad capacitors.

[s0000884]

Re: Dell 3008wfp faulty power supply

That's great advice Selldoor. I'm beginning to think this might be a different problem......

EDID corruption. I remember reading about this while doing some research on a Dell 3008 stuck in a color cycling mode.

Fabian. You can read the thread at Dell right here... http://en.community.dell.com/f/3529/t/19249766.aspx

Technical info on what EDID is here.. http://en.wikipedia.org/wiki/Extende...ification_data

And the only known software with instructions provided by Dell to fix this (since removed by Dell, but hosted here) http://darkshade.homeip.net/cgi-bin/...?m-1318862778/

*****Important****** Any time you are dealing with firmware, or flashing, there is a danger that something could go wrong and the EEPROM could be rendered totally useless. Since the Dell 3008 has 2 DVI ports. Check the other one to see if it works. You could always just use the VGA port. Or HDMI. In other words. ***use at your own risk***

You guys are enormously helpful!!

Back from Christmas & family stuff, I'm going to read through all of this.

My experiences from the past:
1. The longer the monitor had been switched off completely, the longer it took to start up (screen remained black for half a minute).
2. The flickering (till now) occured only after hibernate mode (orange LED); which I hardly ever used.

This makes me think that the monitor may have been faulty for much longer than I previously thought. During years of normal use, I didn't perceive the slow start-up to be part of a failure mode.

Suppose a good signal is being sent to it, how long after pushing the power button does a properly functioning 3008WFP light up?

[Lumberjack777]

Re: Dell 3008wfp faulty power supply

That's great advice Selldoor. I'm beginning to think this might be a different problem......

EDID corruption. I remember reading about this while doing some research on a Dell 3008 stuck in a color cycling mode.

Fabian. You can read the thread at Dell right here... http://en.community.dell.com/f/3529/t/19249766.aspx

Technical info on what EDID is here.. http://en.wikipedia.org/wiki/Extende...ification_data

And the only known software with instructions provided by Dell to fix this (since removed by Dell, but hosted here) http://darkshade.homeip.net/cgi-bin/...?m-1318862778/

*****Important****** Any time you are dealing with firmware, or flashing, there is a danger that something could go wrong and the EEPROM could be rendered totally useless. Since the Dell 3008 has 2 DVI ports. Check the other one to see if it works. You could always just use the VGA port. Or HDMI. In other words. ***use at your own risk***

[selldoor]

Re: Dell 3008wfp faulty power supply

If the problem is due to bad caps the sooner you look at it the better or
leave it off until you can look at it.
When caps are failing they can cause collateral damage which can be difficult
and therefore more expensive to repair.

[s0000884]

Re: Dell 3008wfp faulty power supply

This forum is *very* helpful!
I will certainly follow those nicely detailed & photographed steps; thanks for the links.

However the plot thickens. Yesterday the following went down:

1. I kept the monitor (while in failure mode) on for a while *without* any signal being sent to it.
2. All of a sudden, the screen pops up again! (blue screen: no signal)
3. Connecting the DVI cable with a signal on it makes it go back into failure mode (i.e. black).
4. *Disconnecting* that same cable makes the screen switch on again!

So after a while I thought: let's connect the thing with an analog cable.
5. It worked!
6. After a while I switched it back to DVI --> it worked! (including full-res)
7. Putting the computer to sleep --> display into hibernate (orange LED).
8. Switching computer back on --> Display starts flickering again!
9. Unplugging power cord & plugging back in --> no avail (still flickering)
10. Another computer sleep (orange LED) and back --> display works again.

I included 2 images: one of the screen in 'flicker' mode and one in normal mode.

Before I open it up I think I'll explore this failure mode a bit more. Particularly if the analog connection has had anything to do with it.
If I can get a workaround, I don't have to open it during Christmas

I'll update later. Thanks again.

[Lumberjack777]

Re: Dell 3008wfp faulty power supply

Yes. Time to open it up and check out the boards. You might get lucky and it will be some bad caps on the main board. I have seen that before on some earlier revisions.
As far as the proper way to open it up. I have a post https://www.badcaps.net/forum/showpo...&postcount=351

And this guy has a really good guide with pictures. http://forums.overclockers.co.uk/sho...php?t=18460501

We'll need nice sharp pictures. Mostly of the main board. You might even spot the bad caps. Sometimes they rupture out the bottom on that board.

[s0000884]

Re: Dell 3008wfp faulty power supply

Try one last time with everything hooked up and a nice colorful image being sent to the monitor. See if you can detect any image at all in the dark. If you can't see anything with the flashlight at all; this is most likely main board.

Thanks for your quick response!

I tried once again, room completely darkened (accept for a blue LED..), to see something of an image (flashlight under various angles) when it is black. I didn't see anything.

When I switched on the monitor, it lit up properly (good image) for about 3 seconds this time. Repeatedly switching off and on again gives me a good image for about half a second after it turns black.

Windows properly recognizes the device (Dell 3008 WFP) during failure mode. When changing the desktop resolution I can see it scales properly (during the short time it's on) on the screen.


What's the best next step? Opening up the monitor and photograph the boards?

Thanks again!

[Lumberjack777]

Re: Dell 3008wfp faulty power supply

Hi Fabian. Excellent description of the symptoms.
First of all; if the D22 was out you wouldn't have the blue LED lit up. So that part is good.
It sounds like either a main board failure, or an inverter failure. It might be a bad ccfl, but that would be very rare. Try one last time with everything hooked up and a nice colorful image being sent to the monitor. See if you can detect any image at all in the dark. If you can't see anything with the flashlight at all; this is most likely main board.

[s0000884]

Re: Dell 3008wfp faulty power supply

Hi,

My name is Fabian, yet another unhappy owner of a faulty 3008 WFP. Mine showed somewhat peculiar behavior before failing altogether:

1. Over the past few months before total failure, the screen remained black for the first minute or so, after which it lighted up normally. The LED remained blue during this failure mode.
2. Just before total failure (the same day) the image flickered (mostly the bottom half). It didn't show distortion, just strong brightness fluctuations.
3. The total failure mode (today): screen pops up normally (no flickering) for half a second before it turns and remains completely black. Switching it off and on again repeats this phenomenon. LED remains blue.

When I check the screen in a dark room with a maglite I can't discern any activity; I don't think is (just) a backlight failure.

I am afraid this is some kind of firmware error rather than a power supply failure. My question:
Is it possible / likely that D22 or another 14V-psu component has failed? Should I open the monitor up?
Thank you very much for your time / assistance!

[selldoor]

Re: Dell 3008wfp faulty power supply

There were none for just that board only 4 all together for 3008wfp
think 2 were for full sets and one for an inverter. I am just saying you will be very lucky to find one.

[Bakki1]

Re: Dell 3008wfp faulty power supply

Could you please paste me the links to the auctions? I cant find them.. :/ tyvm

[selldoor]

Re: Dell 3008wfp faulty power supply

whats a realistic price for the main board?

In normal circumstances that might depend on where you live.
Answers you might get would differ wildly from Germany Brazil
philipines Estonia USA Canada, However in this case I suspect no one knows have you found any for sale? I see only 4 items at all on ebay worldwide.

[Bakki1]

Re: Dell 3008wfp faulty power supply

No one?

[Bakki1]

Re: Dell 3008wfp faulty power supply

whats a realistic price for the main board?

[Bakki1]

Re: Dell 3008wfp faulty power supply

Ok, Well the Genesis chip is on the Main board - the one with the video inputs on it.
If you can provide really clear picture of the board (Both sides) and close up of the labels someone may be able to suggest something or help you find a replacement.
First task may be to get inside - there are a few sets of instructions at the beginning of this thread.

getting inside is already done, but i dont have the monitor at my place atm.. going to ask him for pics..

[Bakki1]

Re: Dell 3008wfp faulty power supply

i asked two guys and got to different opionions, thats why..

[budm]

Re: Dell 3008wfp faulty power supply

"I'm able to see the osd and the input source when I'm switching the sources so the display/backlights seems to work." I would think if the video processor is bad, you will not get any image or badly scrambled images.
So the backlights do stay on when the image disappear? I still do not understand about getting the new T-CON board if the GENESIS chip is on the main board.

[selldoor]

Re: Dell 3008wfp faulty power supply

Ok, Well the Genesis chip is on the Main board - the one with the video inputs on it.
If you can provide really clear picture of the board (Both sides) and close up of the labels someone may be able to suggest something or help you find a replacement.
First task may be to get inside - there are a few sets of instructions at the beginning of this thread.

[Bakki1]

Re: Dell 3008wfp faulty power supply

"my dell wont produce any picture, only for the second when i turn the settings back to default." I wonder if the backlights come on for seconds, then black out is what you are seeing.

I'm able to see the osd and the input source when I'm switching the sources so the display/backlights seems to work.