Replacing a fusible resistor on a laptop...?

[Brian Maupin]

A bad car adaptor blew out what HP calls a "fusible resistor" on my
motherboard and I'd like to replace the resistor rather than the
entire motherboard like HP wants me to do. I have one of two options:
1) Take it someplace where they'll charge me an ungodly amount to do
it (one estimate was around $100) or 2) Fix it myself.

I was wondering, will most electronics repair places replace the
resistor or just buy a new motherboard and replace that?

What would I have to do in order to locate the resistor and replace it
if I were to do it on my own? I've done some simple soldering before
but I'm not sure about detaching the resistor...

Thanks in advance!

 

[Andre]

A bad car adaptor blew out what HP calls a "fusible resistor" on my
motherboard and I'd like to replace the resistor rather than the
entire motherboard like HP wants me to do. I have one of two options:
1) Take it someplace where they'll charge me an ungodly amount to do
it (one estimate was around $100) or 2) Fix it myself.

Hi,

On the ones I have the casing is light grey.
It looks like a normal resistor but will have the board legend "FR
xxxx" - they are usually 1/2 watt or so though can be smaller .

Shouldn't be too hard to swap it . I usually cut the legs off flush
with the board and pull the remains through from the print side
(carefully) - works most of the time, then clean up with solder wick
and replace .

-A

 

[Gary]

If it's like most of HP's laptops, it a surface mount resistor near the
power connector. They're pretty easy to swap, just don't use too much heat
on the board.

 

[Brian Maupin]

I'm not able to find anything labeled with an "FR" near the power
connector but I have found a small (probably 1/8 inch wide) grey/black
retangular box directly next to the power connector and it appears to
have a hairline crack in it. Could this be it? What writing were you
refering to? The white lettering on the motherboard itself or the
lettering actually on the resistors?

 

[Gary]

Check to see if there is continuity on the chip with a DVM. You might also
look under a magnifying glass to see it better.

 

[Brian Maupin]

Ok, I'll try and found our DVM to check the continuity. I've also
scanned the mother board and posted a picture of what I think might be
the reisitor. The pictures is located at
http://www.alsocoinoperated.com/mobo.jpg
Is this what it should look like?

 

[Gary]

I couldn't tell too much from the picture.

 

[Brian Maupin]

Sorry, I've posted another picture at
http://www.alsocoinoperated.com/mobo1.jpg this one is about as close
of a shot as I can get.

 

[Andre]

Sorry, I've posted another picture at
http://www.alsocoinoperated.com/mobo1.jpg this one is about as close
of a shot as I can get.

That component is a chip inductor.

Probably an inline filter by the looks of it.

The component to the left could be a fusible resistor however.

-A

 

[Brian Maupin]

Oops, that arrow should be pointing at the smaller black rectangle to
the right. That one appears to have a very small crack in it... could
that be the problem?