Apple iMac A1419 820-4652 Schematic and Boardview

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Apple iMac A1419 820-4652-A
BIOS Mid 2015
J78 MLB CTX
Schematic and boardview

 

[techar]

NO DISPLAY

 

[techar]

I SEND YOU WORKING FILE BUT THE ISSUE BOOTING DELAY, AFTER YOU CLEAR THE FILE COMPLETE NO DISPLAY.
I WILL ATTACH THE FILE AGAIN WITH VIDEO, PLEASE SOLVE THIS PROBLEM

 

[ThienBui]

I SEND YOU WORKING FILE BUT THE ISSUE BOOTING DELAY, AFTER YOU CLEAR THE FILE COMPLETE NO DISPLAY.
I WILL ATTACH THE FILE AGAIN WITH VIDEO, PLEASE SOLVE THIS PROBLEM

Try this slow boot problems in video can not problem bios

 

[techar]

Try this slow boot problems in video can not problem bios

SAME ISSUE
I TRIED 3 FILES YOU SEND BEFORE, ALL SAME ISSUE. ONLY THAT FILE IS WORKING I SEND TO YOU, BUT ITS HAVE BOOTING DELAY ( IF I PRESS THE POWER BUTTON SOUND IS COMING AND BACKLIGHT ALSO BUT APPLE LOGO WILL APPEAR AFTER 20 SECOND}

 

[ThienBui]

SAME ISSUE
I TRIED 3 FILES YOU SEND BEFORE, ALL SAME ISSUE. ONLY THAT FILE IS WORKING I SEND TO YOU, BUT ITS HAVE BOOTING DELAY ( IF I PRESS THE POWER BUTTON SOUND IS COMING AND BACKLIGHT ALSO BUT APPLE LOGO WILL APPEAR AFTER 20 SECOND}

so need check hardware

 

[techar]

so need check hardware

then how its working with another file. and your file completely not working. i just want know why your file (cleared file) not working?

 

[informaticanapoli]

Hi, I need clear ME for this imac 27 820-4652-A.

I change Intel chipset and after iMAc starts but slowly e and no audio recognized.

In attach original bios.

Thanx

 

[ThienBui]

Hi, I need clear ME for this imac 27 820-4652-A.

I change Intel chipset and after iMAc starts but slowly e and no audio recognized.

In attach original bios.

Thanx

 

[JKTECHNO]

hello sir my imac A1419 mb pn no. 820-4652-a
i'm replace cpu old cpu not working i5-4690,
new cpu i7-4770
on imac but no display, starting sound come external display working but imac display not come
can you help me

 

[ThienBui]

hello sir my imac A1419 mb pn no. 820-4652-a
i'm replace cpu old cpu not working i5-4690,
new cpu i7-4770
on imac but no display, starting sound come external display working but imac display not come
can you help me

I cannot test this CPU change