On Wed, 30 Nov 2005 10:31:09 -0000, "Dave D" put
finger to keyboard and composed:


"gk" wrote in message
oups.com...
This is my first time posting, so I apologize ahead of time for any
breach in netiquette.

Can anyone please help me find out what this component is? It shorted
out (water spill) on a Dell Inspiron 5100 laptop motherboard. It is an
8-pin package and the markings a

2042A
36T
DCFR

Picture he
http://img219.imageshack.us/img219/3850/2042a3ku.jpg

Picture cleaned up:
http://img219.imageshack.us/img219/7...2aclean7cz.jpg

Any ideas on where to find a replacement for the component?

Thanks,
gk


The pad is completely missing, leaving a thru-hole visible where the pad
used to be. You'll have to trace that thru hole and see which component it
leads to so you can link it with wire.

IMO, this is not a practical repair for anyone but the most experienced
engineer. It's almost certain that when the component shorted it took out
other semiconductors, possibly the regulator IC, chipset IC, maybe even the
CPU.

I'd remove the IC and check the voltage on the input pad (after you've
repaired it). I'd also check for shorts on the output pins (6 & 7). It
may be that one of the IC's internal MOSFETs failed catastrophically.

Your best bet might be finding the same model with a cracked LCD on eBay,
and swapping the LCDs over. However, even the same model laptops have been
known to use different LCDs.

Dave


-- Franc Zabkar

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