Blank screen , no video a1418

Here you go, hope its not too late ;)

Maybe someone with the proper scematics of the board could tell you the exact model number.

Cheers

Hello,

This is the classic burn by the 12v lcd fuse.

The “P” fuse as it is commonly referred to feeds the 12v through the LDVS connector to the display panel.

Scrap away all the charred and burnt bits on the PCB and replace the fuse. ( available on Ebay ) check the decoupling cap next to it, it nearly aways is OK.

Inspect the ldvs connector and the ribbon for shorts or damage and replace as necessary

Most boards like this are salvageable

Hi peter. Any more info on how to replace the PFuse? I have this issue which needs resolving.

If you are not competent at soldering. I would suggest you send us the board for repair.

I read that you call it “12v lcd fuse” or P-fuse.

On other sites it is called reference designator L9100 which is a 250ohm ferrite bead.

I for sure know mine is blown on my A1418 Imac, but what do I have to order?

Hello

It is a 12 volt fuse marked with a P

It protects the 12 volt rail feeding the LCD via the LDVS connector.

L9100 is not the same thing

Great, thanx for your answer.

Is it the same fuse as used in macbooks then?

Hello. The fuse that has the “p” on it blows quite often if the screen comes loose and pulls the cable out or is turned on when disconnected. The fuse is the same as that used in the early macbooks and can be raided from an old board. Use a hot air soldering station to pull out the old one but use an iron to replace it so you dont blow components off the board.

Thank you