Dell 3007wfp faulty power supply?

[oden08]

Hello, I recently was given a Dell 3007wfp monitor that doesn't power on. No amber light, no nothing. Did some research and found some very good information for the Dell 3008wfp here - (https://www.badcaps.net/forum/showthread.php?t=14195) and thought it would translate to my monitor. Got it apart and there isn't a corresponding D22 that I can see and no bulging caps.

I was wondering if anyone could point me in the correct direction as anything would be very appreciated.

Attaching a pic of the power supply.

[oden08]

Re: Dell 3007wfp faulty power supply?

Anyone have any thoughts? I have noticed some around the WWW that have posted about fixing the 3007 by replacing D22 but can't find D22 - possibly D221?

What strategy do you all use to test the components of busted PS's?

Hello, I recently was given a Dell 3007wfp monitor that doesn't power on. No amber light, no nothing. Did some research and found some very good information for the Dell 3008wfp here - (https://www.badcaps.net/forum/showthread.php?t=14195) and thought it would translate to my monitor. Got it apart and there isn't a corresponding D22 that I can see and no bulging caps.

I was wondering if anyone could point me in the correct direction as anything would be very appreciated.

Attaching a pic of the power supply.

[oden08]

Re: Dell 3007wfp faulty power supply?

Anyone?

[Gingerbeer]

Re: Dell 3007wfp faulty power supply?

There is a fuse on the power board - Mine was buried under a huge glob of hot glue, so look around. Run a continuity test on it, and replace it if needs be. That's all that was wrong with mine, and it's been fine for the last 18 months.

eidt - I can see it right next to your mains input, in that pic.

[oden08]

Re: Dell 3007wfp faulty power supply?

Thanks Gingerbeer, yeah checked the fuse first and it seems ok, tried to check the diodes in circuit but as I understand it you can't check diodes in circuit. About out of ideas.

[slabklab]

Re: Dell 3007wfp faulty power supply?

Hi,
I have the same problem pretty much and tried the same approach but got nowhere. The monitor Has been sitting on my bench for a few months now.

Have you made any further progress?

[bigjohn22]

Re: Dell 3007wfp faulty power supply?

Your picture is very blurry and it doesn't help.

[vangnet]

Re: Dell 3007wfp faulty power supply?

Hi,
I have the same problem pretty much and tried the same approach but got nowhere. The monitor Has been sitting on my bench for a few months now.

Have you made any further progress?

Hello, I'm new here, but i have the same problem.
Looking on the board i have found: the 17N80C3 (power transistor) was burned out, the capacitor 101 1Kv was burned. Now i try to buy the transistor.
Cost €6,00.
i am searching for more problems, but biggest problem is time.

[budm]

Re: Dell 3007wfp faulty power supply?

Better pictures of both sides of the board will help.

[plumpie]

Re: Dell 3007wfp faulty power supply?

My 3007WFP turns off after a few hours, and then when I turn it on again, the time between turning off is in minutes.

This is a different failure mode then what most people here have, so can it still be d22?

To check the caps, I bought a mesr-100 esr meter, it seems to work well on some old caps I have lying around, and the ESR of the caps seems to be good (<0.1 ohms on all, except for c17 which isn't electrolytic but I can't seem to measure the ESR on this one). So it doesn't seem to be the caps.

Should I still buy a new diode for d22? What can can cause the monitor turning off after it's warmed up?