820-00164 bios issue

2informaticos

Administrator
Staff member
What kind of macOS are you trying to install?

When you got into actual macOS, run a benchmark to see if machine is stable.
Check if HWMonitor reports some strange values.
Also start in diagnostic mode.
 

Kyle93

Active member
Mojave or Catalina. Both will not install. Ran benchmark for one hour via external OS seems stable.

All values on HW monitor look good.

Diagnostic mode found no issues.

When trying to shut down from external OS the machine never fully shuts down. Fan never stops spinning, even 30 minutes after shut down
 
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