Laptop charging circuit burned HELP!

[kentuliz]

Hello i have Advent 7555 gx with burned charging circuit. Laptop works fine, but not charging. Im asking help to find this part to buy somewhere.

1. img burned part https://imageshack.us/photo/my-images/580/burned3v.jpg/
2. good https://imageshack.us/photo/my-images/155/goodx.jpg/

First one from my laptop, 2nd one from my brothers laptop. (same laptoms)

thanks for any help

 

[KeepItSimpleStupid]

Might be one of these; http://www.datasheetcatalog.org/datasheet/rohm/bd48-49.pdf

Digikey shows it as a non-stock item and you have to order 3000.

 

[Exo]

Most likely a FET in a switching dc-dc converter - if so, there's probably more damage then just the FET.

 

[kentuliz]

and if someone know what min max voltage should i look for? charger is 19v 6.3A

 

[sparkman001]

Lookin at that damage, I think you are going to need a new motherboard. There may also be a problem with the battery / charging circuits, you may find a replacement on eBay .

 

[kentuliz]

cant find anything at all no motherboard, no chip, nothing...

 

[KeepItSimpleStupid]

How about a model number?

I guess the BD4932 isn't it because of the footprint. 6 pin, vs 8 pin.

 

[sparkman001]

What sometimes looks like a simple repair when a chip burns like that, just find one and put it in. It's not as simple as that. The tiny copper tracks that you CAN see may have burned, but these motherboard are multi-layer and the tracks in between on the submerged layers may also be damaged, and those you CAN'T see! You will never obtain service information because its never released and if it is, its only when its obsolete. The components are more often than not given manufacturer reference numbers to deter cloning. So I'm afraid you are wasting your time.

 

[kentuliz]

found needed parts o ebay.