820-3536-A Fan Spinning for 2 seconds

[Jeremy083]

First thing first,

Water damage on the keyboard. Geen light OK but no boot... I cleaned the keyboard connector and BOOM ! WORKING.

Thought that I was the new Louis Rossman (Biggest mistake ever!) I decided to look under the board the water damage and clean it with alcool. They were corrosion around U4600 and U3310.
And guess what ? Still have green light, fan spining for 2 seconds and stop, no boot !

Need some advice to know where to start ...
Sorry for being such a newbe.

Thanks in advance,

Jérémy

 

[dukefawks]

Both U4600 and U3310 have nothing to do with the board booting. I bet one of the SPI termination resistors/traces is corroded or pin 8 on U1950. Look up u6100 and find all the termination resistors and check them and the traces between them.