>The trackpad clicker button (is this
>the right name? the equivalent of the mouse button) on my 5300 has just
>bitten the dust -- it's been acting wonky for some time, but now seems to
>have quit definitively. Is this fixable, or do I have to track down a
>replacement part, and if so what's needed -- a new palm rest?


Yeah, this happens pretty often on these machines, actually.  This 
could be one (or both) of two problems, that I can think of.  Your 
actual button mechanism has clicked itself to death or the plastics 
that support the button could be bent or broken.

In the former case, you could try taking the mechanism itself apart 
and rebuilding/repairing it from the inside out.  I did this to my 
5300cs's reset button when it stopped working a while back.  Turned 
out that a little lubricant inside the mechanism was all that was 
needed to get it working again.  Otherwise, you'll need to find a new 
button to replace that old one.  Someone else (I just tried Googling 
for this, but couldn't find it) used the power switch/button from a 
Duo's 14.4 modem card (I think, or was it a CUDA button?  They are 
pretty much the same, anyway) and a small post as a substitute for 
the 5300's original wimpy button.  According to the website (if 
memory serves), he was VERY satisfied with the new button's action 
and feel.

In the latter case, you can try fixing the plastic by gluing some 
support to it, or by replacing the plastic altogether.  In fact, the 
button plastics are all one piece - the springiness comes from the 
elasticity in the plastic itself.  The button is fastened to the palm 
rest with two torx-8(?) screws and, with some imagination, forms a 
sort of a "C" shape - the top half of the C being the button as you 
see it in the palm rest when assembled, the side of the C being 
screwed into the palm rest, and the bottom of the C providing a 
contact point to depress the switch mechanism when you push down on 
the top of the C.  Does that make sense?

Anyway, you can replace the button all by itself if you can find a 
donor part.  But it is probably easier just to find an entire palm 
rest assembly from another 5300 (or better yet, a 190) and swap it 
out.

But, yes, you will have to take apart the 5300, at least as far as is 
required to remove the palm rest...  Watch out for the trackpad data 
cable, it's short and easy to damage if you are working ... with too 
much enthusiasm, let's say. ;-)

Undo the three torx screws holding in the keyboard.  Gently pull up 
and out on the edge of the keyboard closest to the palm rest until 
the tabs at the opposite edge emerge from their housing.  Then push 
the keyboard towards the screen and out of the way (you don't have to 
disconnect it for this procedure).  Remove the two clutch covers - 
pull them up and out gently, it's a tight fit.  They may require a 
little bending and flexing, but don't put too much force on them as 
they tend to crack.  After you've removed these, rotate the edge of 
the palm rest closest to the keyboard up and towards you, directing 
the entire piece towards you and away from the keyboard.  When it 
comes free, you will know.  Be careful now, the data cable is still 
connected...  It is connected to the mother board right next to the 
RAM card connector (if you've got one in, you'll probably have to 
take it out).  Gently lift up on both ends of the connector and raise 
it about 1/8"  Don't pull too far, as the piece can break and come 
off the connector, effectively ruining all hope you ever had for 
fixing the button on this machine.  Gently pull the cable out of the 
connector.  If it doesn't come free with the slightest pressure, you 
haven't completely "opened" the connector - lift up both edges of the 
connector until you can get the cable loose with minimal effort.

At this point, you should congratulate yourself.  Take a break, drink 
some iced tea, then set about fixing the button.

Re-installing the palm rest is just the reverse.

If you are going to do this anyway, why not track down a 190's palm 
rest assembly?  190s all had tapable trackpads, and that is a nice 
feature to have.  They are 100% electrically and physically 
compatible with the 5300, so a simple swap is possible.  I did this 
for my 5300ce and it works great!

Hope that helps!

Hope that helps!
Drew


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