Re: Can thermal paste cause corrosion?



Liquid Metal doesn't cause corrosion. It's made of a mixture of Gallium, Tin, and Indium (mostly gallium) which is an eutectic alloy. If applied to aluminum, it will alloy with the aluminum, turn black, and it will literally start to crumble away. This type of thermal compound is only for use on nickel plated copper, and plain copper. I use the stuff between the integrated heat spreader and the CPU core itself. Works wonders....

Re: No Power Dell U2410 Monitor

A few months ago my u2410 died on me and i as too busy with fun stuff like protecting friends businesses up in LA from looters, etc to actually fix the display and bought a new Acer 1440p 144hz IPS screen... but now that things slowed down I finally took it apart after a few hours last night was stumped. Came here like i did with my 2407WFP and began reading. First thing that got my attention was the comments a few pages back about resoldering a few spots on the power board. The factory soldering job on my board didn't look very good with lots of...

Re: Dell 2407WFPb Monitor - Bad Cap



Doh!!! Time to order a new IC....

Re: Dell 2407WFPb Monitor - Bad Cap

Well.... I replaced the big cap, q651 MOSFET, and burnt out R670 resistor... Put things back together just enough so I can apply the power and when I did... I saw a quick flash from the ceramic fuse.

Any thoughts?

Edit:

Hmm... Did the fuse blow because the cap was empty? From my experience with powerful car audio amplifiers I recall that when first applying power the fuse would blow because of that sudden power draw to fill the amos built in capacitors or if I was using a separate stiffening capacitor....

Re: Dell 2407WFPb Monitor - Bad Cap

Ok.. here are some photos of the damage. I've already removed the big cap and R670, and installed a Rubycon 450v 120uF capacitor. I just did some testing and I believe Q651 is bad, and now that can see the IC's up close, it looks like IC651 may be bad. Not sure on that though.

But I came here to get your guys opinion considering I'm very novice at diagnosing problems with circuit boards.

I found "new" power boards for the 2407wfpb on ebay, shipped from Hong Kong for only $24.99, which isn't a bad price....

Re: Dell 2407WFPb Monitor - Bad Cap



Mine went "ssssssst... BANG!". Scared me half to death the other night. I'd say it was as loud as a .22 cal "SHORT" being fired. It happened while bringing the 2407wfp out of standby mode. The big cap is blown, so is R370. Other than that no visible damage.

lemme go take some photos. brb.,...