820-2879: High fan, no bad sensor, no system slowdown

[pauly341]

Greetings. I have an 820-2879 board with high fan. Diagnostics showed no bad sensor and system also does not show any slow down. All seems to work well otherwise. All measures well around fan connector (R5660, R5661, R6556). I replaced Q5660 just to cover my bases. I replaced trackpad also but no luck. Any thoughts on where to look next?

Paul

 

[dukefawks]

Does it spin on full immediately on power up? Tried a different fan?

 

[pauly341]

I tried a few different fans, checked actual temps and everything looks normal. On power up the fan starts normal but slowly builds up speed - it takes about a minute to hit full speed.

 

[dukefawks]

Check all temps in the hardware profile in ASD. Slowly building up is a typical sensor issue. Maybe one of them is reading high. Also disconnect battery and see if it is ok.