820-00840 PP5V_S4_TPAD_CONN

[Blackmambo90]

Hi all!

Have this board with a not working trackpad

After inspecting the board i saw that L4800 is melted - no courant that goes to trackpad. It also damaged the tracks under it as well as it have damaged 4830 but not sure if the damage is purely cosmetic or if i will have to find this one some where.

My question is: is L4800 mandatory or it can be bypassed? Any idea what could cause that? The board look clean and the trackpad as well, but i see that some one already played with the screws of track pad... not sure if the one installed is the original or a replacement.


Thank you!!

 

[2informaticos]

L4800 can be bypassed with tiny wire.
First be SURE, no short on J4801 side (C4800 pads), w/ and w/o trackpad connected.

 

[Blackmambo90]

@2informaticos thank you! Great!
There is no short how ever i need U4830 as well.. it felt apart as soon as i touch it... cant find it online :/ do you know where it could be found?

 

[Blackmambo90]

Update:
I guess i found it, is it the right part? https://www.digikey.ca/en/products/...4IgTCBcDaIOwBYA2A3AxgRgOYAYAcWAZgDQYDMEAugL5A

I also find 74lvc1g08fz4 from 820-01598.. is it interchangeable?

Thank you!

 

[2informaticos]

74LVC1G08 is the base code you need to search for, in SOT891 case.
It can be found in many older MacBook boards.
Just do a search in pdf schematics of your scrap boards.

 

[Blackmambo90]

Yes, exactly how i was searching for it but i onpy have 3 board and its newer board (2018+) witch does not have this chip.. anyways, ordered online, hopefully will be here soon