820-3228 boot chime in loop

raainxx

Member
Hi,
i have this board with a problem with chime in loop, like the video.
i try to clean the ME
do you have some idea about this problem?
thanks
 

raainxx

Member
i don't understand for the video, i see the video.
we can see when i plug the power cord, the mac start and make dong continu.
can you explain SMC bypass?
 

2informaticos

Administrator
Staff member
"i see the video"
We cannot; YouTube tells us not available...

Press power button, connect power and maintain pressing 5-10s.
 

raainxx

Member
ok i don't understand for the video.
when i start in SMC bypass, i have fan in full speed and same problem dong in loop.
have you an idea?
the BIOS is clean?
 

raainxx

Member
i test your file but same problem (normal and SMC bypass), with new memory, idem.
my customer say, the mac mini boot before change the hard drive well, but on the hard drive was install hackintosh with efi partition, can make a problem on the board?
 
Last edited:

2informaticos

Administrator
Staff member
Disconnect HDD and try to acces boot menu; see if something change.
Look for knocked off, or ripped components.
 

raainxx

Member
i work already without HDD, just fan and led front panel. I try to change the power supply, without led front panel, always same.
I check component on the board without find anything, i haven't schematic, i can't check the supply on the board.
 
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