HP530 - Board Damage Due Fried Mosfet Advice Needed

[tizac]

Hi

Got a HP530 which stopped charging and powering on although the led would blink a little when power supply first inserted but would fade out with no sign of life after

Striped the laptop down to find one on the mosfet had fried and left a bit of a mess on the board. Ive cleaned the section up but there is damage to a copper section which has raised from the board.

Can this be repaired easly or can someone offer advice on a suitable repair option

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[Toasty]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

Please follow these instructions for attaching images to posts.
Please don't use Image Shack or similar sites as they delete images after a while.
The Forums lose your picture then and so does anyone else who may read your thread in the future.

https://www.badcaps.net/forum/showthread.php?t=1868

I've done it for you here.

Toast

[Toasty]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

Using a low wattage soldering iron and some solder wick, carefully clean up the pads for the IC to mount to. Smooth the lifted foil carefully with a wood or plastic tool.

The lifted ones are all together and could likely be reattached to the board with some cyanoacrylate (Super Glue) when you replace the IC. A drop under the edge and hold it down for a minute with a small screwdriver or such. Give it a few minutes to set completely.

When you are ready to replace the IC, I would find a way to hold it in place (lightly) with a clamp of some type. Use some liquid or paste flux and tack solder 2 legs on the other side first. Then do the single one closest in the picture and finally the 3 lifted ones. Then go back and flow them all correctly.

You did not mention the chip number. Do you know it?

Toast

[tizac]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

Sorry for long time to reply.. chip number is FDS4435BZ if the copper section breaks as it seems very filmsy. what would be the best way to repair or would it be pointless? could I resin in some connection points and attach.

[PCBONEZ]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

He told you, glue it back down.

With three connected in a row like that it is probably all ground pins.
-> CHECK THAT with the data sheet for the IC.
Worst case fix is to run a wire from the pin to where ever the trace goes.

[RJARRRPCGP]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

Please don't use Image Shack or similar sites as they delete images after a while.
The Forums lose your picture then and so does anyone else who may read your thread in the future.

And Photobucket is the worst! It's guaranteed that you're gonna get an error about it not being found!

[aqibi2000]

Re: HP530 - Board Damage Due Fried Mosfet Advice Needed

That's fine pins 1-2-3 are connected together and the trace itself is perfectly visible. solder small wries to the pads to the 1-2-3 pins avoid the copper plane.