Macbook Air 820-3437-B laptop very slow

ielectron

Member
Hi I have now MacBook Air 1466 820-3437-B. Laptop is slow, loading system very long (but after load in system it works fine)and want load installation USB stick. It was slightly liquid damaged around U1900 main board has been cleaned and inspected. I tested laptop with ASD, no sensor or other fault found. New EFi with old dumped bin and ME region cleaned doesn't resolve issue.
All main rails are ok.
Any idea what could slowing down this Mac ?
Also I tried new battery other trackpad with new flex, new power board with new flex, other ssd different USB key with system no luck.
Anyone have something like this before?
Any help much appreciated.
Thanks
 

ielectron

Member
Thanks for response I checked under microscope no corrosion on one legs or connections or parts. I expected in first place it will be thermal sensor issue that how it looks like but no errors. Do you think if there is no errors SMC still could be faulty? It will be very unusual unless some liquid damage go under. I will check it tomorrow and report here if SMC from donor board resolve issue.
 

2informaticos

Administrator
Staff member
Try disconnecting camera.
Also try without LIO flex connected; fan will go high as normal in this case.

Run HWMonitor and see if any temp goes crazy.

"ME region cleaned"
How did you clean it?
On the forum should already be posted links for clean ME region for sure...
 

ielectron

Member
I checked what you said, without LIO flex or disconnected camera is same.
HWMonitor shows right temps nothing unusual.
I search forum trying to find this bios but this with I found doesn't work, link is not active any more. Could you clean my original bios for me please.
I use method with swiping ME region with clean one in hex code editor.
Thanks for help
 
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