Dell 2405FWP; bad Cap and bad resister?

[mechantbruce]

Hi,

I have a Dell 2405FWP I bought with me when I moved from USA to France. It is dual voltage, and it worked for a while, but now it wont power on.

I have very (very) little electronics experience, but I would like to learn more, and hopefully experience the satisfaction of fixing more things instead of just junking them and buying more stuff.

So... I watched this video to learn how to take the back off (it was a bit counter-intuitive; you take the front bezel off to access the back). http://www.youtube.com/watch?v=RXAQxwCTuuI

Looking around, I saw 2 parts that look bad to me;
--- a Elite 129uF 450V Capacitor
--- a R?70 resistor (? character is hard to read; may be a 6) (red, red, silver, gold)

Here is a picture of the 2 parts I think are bad;


And here is where they are on the board;


Can I please get someone more knowledgeable than me to (visually) verify if both these parts are bad? (let me know if you need more/better photos).

If they are bad, could I please get some help determining exactly what I need to buy, and where? (it will need to be a website as I live in France).

Thanks for your help,
Bruce.

[selldoor]

Re: Dell 2405FWP; bad Cap and bad resister?

Please can you remove the pictures and repost them using Manage Attachments
which is found under go advanced which is below quick reply.

The two items you mention are faulty - the main cap - looks like 120uf 450v
and the resistor has a hole in it - i will check out the value from the colours
EDIT
Red Red Silver Gold is 0.22 ohms - you will need to physically measure the resistor to know the wattage

Other items may also be blown eg the transistor near the resistor and whatever is on the heatsink connected to the resistor

[budm]

Re: Dell 2405FWP; bad Cap and bad resister?

That is PFC Voltage booster section, the MOSFET on the hest sink next to the burnt out resistor, more likely to be shorted out and more likely to take out the PFC Controller which is the surface mounted.

[mechantbruce]

Re: Dell 2405FWP; bad Cap and bad resister?

Thanks for the replies,

-- how do I edit the original message; so that I can remove the images and re-post them as attachments (as requested)?

-- So, it sounds as if the problem is likely to be bigger than just these 2 components. Is it worth me pursuing? As a raw beginner I don't really want to invest too much time and money into this just to discover that the problem is beyond my ability to diagnose and resolve (PFC Controller sounds like it would be difficult to source (and expensive)).

Thoughts?

Thanks,
Bruce.

[budm]

Re: Dell 2405FWP; bad Cap and bad resister?

You may have also other sections of the power supply that will need to be checked for shorts or open as well. You may want to find out what the replacement board will be first.

[Fesh0r]

Re: Dell 2405FWP; bad Cap and bad resister?

My monitor suffered what looks like an identical failure as per attached image, an hour or so ago, and this post was one of the first hits.

Based on these replied I guess I should be looking for a full PSU board replacement rather than just replacing the obviously busted cap and resistor?

[mechantbruce]

Re: Dell 2405FWP; bad Cap and bad resister?

Here is a link to another post with a lot of detailed troubleshooting information. FYI.
https://www.badcaps.net/forum/showpo...3&postcount=77