A1278 cofee spill, bad keyboard, burned IC on mainboard

[Stokholm]

Hello All

Looking at my father-in-Laws MacBook Pro unibody A1278 unibody. He accidently spilled cofee onto the keyboard.

The computer seems to run just fine now 1 month later, however the backlit on the keyboard is gone and many keys on the keyboard are not working correctly.

On the mainboard a single IC is burned, can you help me to identify it please:

 

[Stokholm]

It is a 820-2936b board - please help?

 

[jav6454]

Not easily identifiable, and at any rate, you'd have to desolder and do a proper reflow solder for that specific component. Assuming they sell you just one (and the proper one).

 

[Stokholm]

Not easily identifiable, and at any rate, you'd have to desolder and do a proper reflow solder for that specific component. Assuming they sell you just one (and the proper one).

I can do the soldering myself, but I was hoping someone had a logic board diagram or a Picture showing the print on the component.... it looks like a larger version of the component just to the right of it - but I need to know the correct value.

 

[jav6454]

Schematic of the logic board only Apple has, as well as the exact BOM. We can guess, (go to ifixit to a full resolution picture of the logic board needed) but it will be hard to be sure of the exact component.

 

[Stokholm]

Great answer from Oldturkey at IFixIt:

"Stokholm, that is reference designator C6603 and is a 100UF 20% 6.3V TANT capacitor. The case is a A L1 and something like this or on here should work. the capacitor is not part of your keyboard backlight, but of the Speaker Amp circuit. Hope this helps, good luck."

Thank you all for help.

 

[Stokholm]

UPDATE:
I received a new keyboard and backlight, it all work very well now. I haven't replaced the cap yet, as I am still waiting for it to be delivered.

Can it be dangerous to use the computer with the burned cap?

 

[jav6454]

UPDATE:
I received a new keyboard and backlight, it all work very well now. I haven't replaced the cap yet, as I am still waiting for it to be delivered.

Can it be dangerous to use the computer with the burned cap?

Depending on what the burnt cap is used for. If it's for audio, the most that could happen is your speakers stop working or you damage onboard audio chipset. Either one is a bad outcome. I would refrain myself from using it until I get the replacement cap.

 

[laurihoefs]

UPDATE:
I received a new keyboard and backlight, it all work very well now. I haven't replaced the cap yet, as I am still waiting for it to be delivered.

Can it be dangerous to use the computer with the burned cap?

Before you replace the capacitor, check the built in speakers for shorts with a multimeter.