Repariere deine Sachen Community Store

Model A1419 / Ende 2013 / 3,2 und 3,4 GHz Core i5 oder 3,5 GHz Core i7 Prozessor, ID iMac14,2

340 Fragen Alle anzeigen

Einstellungen

Has my PSU blown my logic board

Same old initial problem, black screen and no response, however I have no diagnostic LEDs.

General consensus was to replace the PSU and power cable. After doing this I still have no diagnostic LEDs. (I have since returned the newly order PSU) The logic board would be a logical place to move to next. And that brings me here.

Is it possible that the PSU has blown the logic board in some way but still show voltage passing through the power cable, PSU and logic board?

And if so, upon replacing the logic board, is it possible the old PSU could blow that too?

Both old and new PSUs had a very quiet slight electrical hum and this is the only sound the Mac makes when the power cable is plugged in.

The model I’m using is the iMac 27" A1419 Late 2015 5K i5 3.3 GHz.

Beantwortet! Antwort anzeigen Ich habe das gleiche Problem

Ist dies eine gute Frage?

Ja Nein
Bewertung 1
Einen Kommentar hinzufügen

1 Antwort

Filtern nach:
Am hilfreichsten Neueste Älteste
Gewählte Lösung

Einstellungen

Hi

It is very possible that the PSU caused a power surge unfortunately

When power supply’s fail they can take lots of things down with them like the logic board and screen…

If you can take the logic board out and look for any burn marks or discolouration ,that will help indicate if the logic board will need replaced or repaired

Here’s the guide for getting it out

iMac Intel 27" Retina 5K Display Logic Board austauschen

If you are unsure of any things you can use this guide to upload some photos so we can help you with it

Bilder zu einer vorhandenen Frage hinzufügen

Hopefully this helps

Any questions please ask

Thanks:-)

iFixit Bild

Anleitung

Bilder zu einer vorhandenen Frage hinzufügen

Schwierigkeitsgrad:

Sehr einfach

—

2 - 5 minutes
iMac Intel 27" Retina 5K Display Logic Board Bild

Anleitung

iMac Intel 27" Retina 5K Display Logic Board austauschen

Schwierigkeitsgrad:

Schwierig

—

2 hours

War diese Antwort hilfreich?

Ja Nein
Bewertung 1

3 Kommentare:

That’s useful to know. If the logic board was shot it would make sense that the new PSU didn’t turn on LED1. It seems to be about the only reason it wouldn’t work (bar power source problems)

However.

Following your prompt reply I decided to further inspect the PSU. With a visual inspection I couldn’t spot anything significant and with the power on I was trying to isolate the hum.

Whilst doing this a knocked screw has managed to fall and find into the PSU, connecting something to something which then proceeded to go off like a flash bang.

So that answers that one I guess aha

I was going to source a replacement logic board tomorrow but now with the PSU as well. I think a refurbished/used Mac and a hard drive swap is the way forward.

Apologies it’s a bit of a dead end but thanks for answering my question either way

von

@ramba123 - Sadly, your power service might have been the source of the event. Make sure to get a good surge suppressor or better yet a good UPS as well as check your buildings outlet wiring as well as the breaker panels ground connection. That way your gear is protected from something coming from the power lines and for lighting strikes.

Basically, the surge came into your system killing your power supply and logic board.

von

@ramba123

Sound like a plan

Please let me know if there is anything else

Thanks:-)

von

Einen Kommentar hinzufügen

Antwort hinzufügen

Zach Ramba wird auf ewig dankbar sein.
Seitenaufrufe:

Letzte 24 Stunden: 0

Letzte 7 Tage: 0

Letzte 30 Tage: 2

Insgesamt: 39