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820-02020 (A2338) MacBook Pro M1 fans always high.
- Thread starter BCN_Techs
- Start date
First, try with external monitor, disconnecting internal LCD.
This way ALS is not connected.
Also test with known good trackpad flex/board.
Start in Diagnostic mode and see what error pops up.
You can also install HWMonitor and check reported temps.
This way ALS is not connected.
Also test with known good trackpad flex/board.
Start in Diagnostic mode and see what error pops up.
You can also install HWMonitor and check reported temps.
With external LCD works same way. Fans running high speed. Tested with good trackpad and flex and same.
Also there is no way to boot in diagnostico mode. Computer is just ignoring keyboard before login screen ( no pram no diagnostic mode, no recovery mode).
I found that there is no way to shut id down. When i shut it down by system it turns off display and continue with fans running full speed, and if i shut it from button it starts automaticly again,
Also there is no way to boot in diagnostico mode. Computer is just ignoring keyboard before login screen ( no pram no diagnostic mode, no recovery mode).
I found that there is no way to shut id down. When i shut it down by system it turns off display and continue with fans running full speed, and if i shut it from button it starts automaticly again,
Check UD230 and its related components and traces.
UD230 seems to be ok, also all componentes near by. Finally i run diagnostic ( sorry i didnt know that on M1 it's different way to start). Diagnostics says: They may be issue with FAN PPF003, but new FAN does same
P.S. And there is no way to shut this mac down
. Display turning black but fan continue spinning
HW monitor and HW sensor doesnt give any info, except of battery charge. May be due MacOs Ventura
P.S. And there is no way to shut this mac down
. Display turning black but fan continue spinningHW monitor and HW sensor doesnt give any info, except of battery charge. May be due MacOs Ventura
Last edited:
Check components and traces around QE500 and UE/JE501.
This was first i checked and seems to be all ok.
I was thinking and they way mac starts (fan high, always turned on) is very similiar to SMC BY PASS mode in previous Mac series, like power button is pressed always. As I know theese models smc is integrated with CPU and bypass is not working same way, right?
Start Apple Diagnostics:
support.apple.com
Look under Apple silicon...
You can also try DFU restore; save data if needed.
Use Apple Diagnostics to test your Mac – Apple Support (UK)
Apple Diagnostics, formerly known as Apple Hardware Test, can check your Mac for hardware issues.
You can also try DFU restore; save data if needed.