Re: Dell 2405FPW power supply fault.

A TLDR problem I see.

The power supply is currently toast as per my initial post and the cost to get the various components is higher than I'm prepared to pay (especially considering they may just let the smoke out as soon as they're replaced).

I'm currently after the current that I need to be able to supply from these rails.

To answer you *precisely*, since the main fuse is blown, I'm not going to have any lights or picture, clearly no output from the power supply, and no input voltage either (after...

Re: Dell 2405FPW power supply fault.

In [URL="https://www.badcaps.net/forum/showthread.php?p=323405&posted=1#post323405"]another thread[/URL] I've discovered that the output voltages are likely to be around 21.7V and 6.6V and that each is fused at 5A (which at least gives an upper limit on the current)



Thanks Denz & SeldorRe: Dell 2405FPW power supply fault.

In [URL="https://www.badcaps.net/forum/showthread.php?p=323405&posted=1#post323405"]another thread[/URL] I've discovered that the output voltages are...

Re: Dell 2405fpw - Backlight problem



Thanks Denz. I can't help you with your problem. But you've helped me with [URL="https://www.badcaps.net/forum/showthread.php?t=27183"]mine[/URL].

Seldor also helped by making me realize that F701 and F702 on the power board are fuses.

Thanks guys.Re: Dell 2405fpw - Backlight problem



Thanks Denz. I can't help you with your problem. But you've helped me with [URL="https://www.badcaps.net/forum/showthread.php?t=27183"]mine[/URL].

Seldor...

Re: LP2407 No Display

Consider the cost of replacing other caps too. You may find that with shipping it doesn't add a lot more to get a full set.

Make sure you get low-ESR capacitors where appropriate. If the exact capacitance and/or voltage is not available it is OK to go 20% to 50% higher in capacitance and higher in voltage. As you increase either the size increases, so if you go too far, they won't fit.

It is also advisable to try to locate specs on the original capacitors (OK, that may be hard) so you can determine the ripple current rating. Finding...

Re: LP2407 No Display

Yep, you have a good set of bulgy caps there.

The ones on the inverter board seem to have vented a little electrolute out of the tops.

The doming on the top surface may be slight, but *anything* is a sign of damage.

At the very least, I'd be replacing all the ones that have domed tops, and any similar ones nearby. (i.e. if there are 3 in a row and only 1 is obviously damaged, replace all three).

Replacing all the electrolytic capacitors may be going too far, but unless you know which ones are bad......

This came to me in a "partially repaired" state.

[SIZE="4"][B]Stop reading here [/B][/SIZE]

Skip to the end... The stuff in the middle is what I've found out. But I think I want to bypass the original power supply, so my REAL question relates to the voltage and currents for the rails generated by the power supply.

It seems to have had the classic 2405FPW fault of the 400V capacitor giving out.

I've read [URL="https://www.badcaps.net/forum/showpost.php?p=178133&postcount=77"]this[/URL], and I can spot a number...

Re: New Members - please post your introductions here

Hi, I'm a moderator on another electronics forum and I just acquired a Dell 2405fpw that someone has tried to repair :-| so I went Googling and found lots of advice here for this non-capacitor fault.

I've been an electronics hobbyist for over 40 years and I've done my share of fixing of stuff (including re-capping a number of power supplies)