Step 8: remove the keyboard upper trim
+ Note: one of the eleven screws removed in step 5 holds this trim in place. Do not take a shortcut and skip removing the screws!
+ The upper antenna cable (the one towards the rear of the machine) is grey.
+ Pull up on the black plastic tabs to disconnect the display connectors.
Step 17: Remove screws
+ There are 5, not 4 screws on the P1630
+ Still more cat hair...
Step 20:We need to carry on further to get to the USB connectors. On the USB audio board:
MADE IN VIETNAM
B.3 D.5 F.7 H.9
On the reverse of the card the serial connector has a tag that reads:
Delphi Modem 040
Approval No. 3785
IC: 4005B-DELPHI, REN:0.1
Careful examination of the the rest of the system does not find any signs of damage: flare points, melting, burn spots.
So now we have five choices:
1. Declare faith in the take-it-apart-clean-it-and-put-it-back-together philosophy:
a. Put it all back together to see if it flies
b. If it doesn't work then take it back to the shop and ask them to do all the foregoing.
That seems a waste, plus time, money and data liability, since I've already done all this.
2. Take the board to the shop and ask them to replace it.
3. Try to find the board myself.
4. Do #1a and if it doesn't work then #3.
5. Do #3 and on success or failure #1a. Then on failure #2. In any case keep the gear (and data) here until the card is replaced.
I vote for option 5. We have seen black residue in the past that didn't matter, e.g., the mouse. But if the card is not terribly expensive better to replace it now, given the burns and residue. And in any case delay turning the machine over to strangers until all other options are exhausted.
Tomorrow is another day.