After having opened mine W8804D65X86 of which everymac says :

"standard storage: 320 GB HDD Std. Storage Speed: 7200 RPM

Details: A 500 GB Serial ATA hard drive also was available by custom configuration."

I seen to remember looking at the HD connector that it did not look like SATA , could it be they also fitted (P)ATA with a miniaturized replacement for the 40 pin connectors ?

Anyone ideas ? The disk signals imminent SMART failure Disk utility refuses to First aid it.

and while typing this I ran First aid again to copy and paste the error message here ...
and wonders still seem to happen. First aid OK . I threw away 1 of the may partitions and partitioning also worked !

I will still post it to hear about the connector , which I did not take of the disk for at the time of my opening the 20" it was just for cleaning and the hard-disk warning came only a week later .

So thanks for reading -and possibly answering- this .

Ciao, bart koens

bart.koens@gmx.com

Belgium

what should the output voltages od the led driver board be?

I have 2 boards both give 11.8V

ESPOWER stating Vin 12Vdc 7.2A Vout 42.3VDC this came from a working iMac 27 “ 2010 of which the Videocable connector was damaged by mismanaging the LCD removal (working correctly before)

so I assume this one is defective giving only 11.8V ? or is the backlite switched on by the LCD logic?

The other one:

DARFON HF

4H+V2676.251 /A

backside marked :

cRLus (the caps RL as reversed letters)

E206453

model V267-604

this one from the iMac27” 2011 which I opende because after often suffering from the screenblackouts

when de blackouts started coming 3 sec after startup

I did try all tricks given to resolve the blackout problem , but it keeps coming back :(

I hope to receive some help/advice

bart.koens@gmail.com

Opening my iMac 27 EMC2546 due to a broken display.

It showed me that though iMac are build with will with good parts , Apple surely goes a long way to be extra user unfriendly , like placing the bios battery in such a way, that to replace it is almost as much work as changing a CPU , while it might just as well have been placed somewhere in the memory compartment.

@ Albert Min https://www.ifixit.com/User/3139679/Albe...

do you have a matrix showing the interconnections , my keyboard duplicates some keys f.i q & p both result in qp with 1 press as welle as some others . I just opened mine and set it to soak in a light detergent , will rinse tomorrow and then wait for drying to test .

bart