820-2915 doesn?t recognize hdd

[Chuck60]

Hi I have another 820-2915 that doesn?t recognize the hdd.
ive never encountered this before so I?m basically stumped my first instinct is power but I hear the drive. So I?m checking data lines all I get in the screen is a flashing folder. internet recovery also fails

 

[2informaticos]

Usually bad HDD cable; if machine worked before with the same HDD.
Also is possible that no OSX particion exists, or APFS not supported in BIOS; if HDD was changed, or BIOS messed up.

Try first to boot USB OSX and check if Disk Utility recognizes internal HDD, at least.
Test known good working HDD and flex too.

 

[Chuck60]

Yes I?m using test known good hdd cable and 2 test drives boots from the another 820-2915b OS X Lion dvd won?t install either will try a usb install and get back to you
thanks

 

[Chuck60]

Yes it does recognize the drive. Using a usb with OS X. Can erase but not install and it won?t boot from a working drive :/

 

[2informaticos]

Can you format internal HDD, as Mac OS Extended?
Check integrity of all resistors, caps and traces around J4501 and U4510.

 

[Chuck60]

Ok will do.