Q23 is a SOT-23 6 pin package and it's
What exactly is the chip? I can swipe one from a
dead MLB but I'd rather not if I can just get a new
part. I don't even know exactly what sort of
component Q23 is, except that it's some sort of
I looked at a couple of other TiDVI MLBs I have
and found these numbers on the chips:
43FDG or 43FD6 - can't tell for sure- with the G
(or 6) underlined?
431DA - with the A underlined?
What caused the chip to burn up like this?
Dunno. I acquired this TiBook with broken hinges
which naturally points to cable damage causing a
short, but I can see no problem with the cable.
AFAIK the LCD itself still works fine.
Well, I ended up swiping a similar Q23 from a
dead MLB. Removing the dead chip isn't difficult,
just snip leads and unsolder one at a time. Pulling
the replacement from the other board is more
difficult. Since it's got only 3 legs per side I
was able to move a pair of irons quickly enough to
get each side free. I also grabbed the cap at C224,
dunno if it was needed or not, but since I already
had it . . .
Result was what I expected, LCD display now
The broken hinge was the primary cause, the LVDS
cable got cut or scraped at some point afterwards.
I more carefully reexamined the cable and found a
tiny nick in the insulation on one of the lines fed
by Q23. I presume Q23 supplies power to the LCD's
onboard controller PCB, so it makes sense a shorted
power feed would kill any coherent output.
This fault is easily fixable, it's not even
necessary to pull the MLB from the case. I imagine
it's not uncommon amongst the many broken-hinge
TiBooks, and for those similarly afflicted I'd
still like to be able to point to a correct
replacement part. If you have any idea of the part
ID and a source please contact me and I'll add the
info to this page. TIA :-)
[macdan at comcast dot net]