820-2850 cycle boots/ crashes randomly, boots up randomly.

[nate8organic]

got in a 2850, customer claimed random crashing. replaced the c9560 and voltage there is good 1.5v. the problem is when i plug power in or power it on it cycle boots sometimes the normal 2 times then boots up but when loading the apple logo it often crashes sometimes it will load in and works without any trouble. sometimes it will just spin the fans and stop cycling over and over. a couple times the fans turned on and did not turn off but there was nothing on the screen.

 

[Gurmon]

Any crash logs you can paste here ?

 

[nate8organic]

not as of this moment, when the computer does turn on its not showing any crash reports. will try to get one and post back

 

[Gurmon]

i'd just do the simple things from here on, since you already replaced C9560.

Perform component isolation, check for bad RAM slots. If this doesn't fix it, give it back

 

[dukefawks]

Sounds like a nightmare if it is not a bad RAM slot.