imac a1418 21.5inch power

[Joyoungjae]

Hi Sir
IMac comes out up to 3rd when you press the LED button.
However, only the fan runs and there is no screen response.
When the power is turned on, smoke comes out from the photo and the corresponding part and smells of burning.
The marked part has a ground short.
Is there any way?

model is imac 21.inch 2013


Also, the device was burned and removed.
Can I remove it?

[mon2]

Re: imac a1418 21.5inch power

The circled parts are ceramic capacitors. It is not clear which parts have been replaced.

Can you take another picture of the same area and point to which parts you have replaced?

Are the parts / pads no longer shorting?

If you do not see the 4th LED on, this means the LCD screen is not communicating with the logic board. Check your LVDS cables, the LVDS connector and their seating.

Do you see the backlight coming on for the LCD display?

Any chime from the unit? Cannot recall if this chassis will chime or not on power up but do try the PRAM reset. Hold down the PRAM RESET keys till the system chimes 2 times then let go.

https://osxdaily.com/2010/11/15/reset-pram-mac/

[piernov]

Re: imac a1418 21.5inch power

You need to disclose the full history of the machine, something clearly unnatural happened over there…

[Joyoungjae]

Re: imac a1418 21.5inch power

Thank You sir

I found the cause
The cause was the problem with the backlight chip
There was no screen response and no sound, but the cooler worked well.

Thank you so much for answering.


Backlight line capacitors went out and it was hard to replace them all.