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Thanks. Ok, I will dig deeper with the backlight issue

Hi Got a no back-light unit Backlight circuit looks good R5117 completely burned out thou, cant attach it back as both points are also burned out. Any tips how to attach the replacement? Closer inspection revealed that the Q5158 also has damage on the CPU_THRMTRIP_3V3 line

Ok, its on the screen side, the connector is liquid damaged. Hmm, looks like a delicate job to swap this connector. Any pointers?

OK, could be the cable, I will test it Cheers

Hi Yes picture present Pin 1 53.75v With screen connected or disconnected is over 173 k Ohm

Hi For no apparent reason the backlight stopped working Where do I start? Is that something common with those boards

Tried that with a U5110 from another board but same results. I cant be sure about that one so I ordered a few ICs.

R5100 comes up as 96.7k omhs so it seems fine removed the u5110 and I am getting 3.4v SMC_RESET_L - looks like good direction SMC_PM_G2_EN 3.4v the pads for u5110, pad 5 3.4v, pad 8 0.42v ( thats without u5110 in place) SMC_ADAPTER_EN 3.44v PM_BATLOW_L 0.03v PM_SLP_SUS_L 3.32v PP3V3_S5...

Ow yes, the charger is 3rd party :/ SMC_RESET_L resistance to ground goes up and down 300 -400 k? By accident I discovered that there is continuity between SMC_RESET_L and CHGR_RST_L, not sure if that supposed to be the case. I will follow your advice and report back Fingers crossed

Cheers I redone the U5110 and the bits around yesterday Yes, I still get the green light when the flex cable is connected. Checked SMC_RESET_L with and without flex cable, still 0v, I checked on 2 points far away from each other Tried reflowing SMC, 200 Celsius with my quick 861da and mg...

2informaticos client is happy to run it with the app ( he just want it asap) In your experience, would it matter if I left it like that?

Thanks 2informaticos, just shows you how little I know SMC_RESET_L 0V unfortunatelly U5110 0v on both 5 and 8 pin SMC_PM_G2_EN is missing OK, I will reflow SMC and see if that makes it any better

thank you OK, cpu heatpipe, cpu proximity, pch die, memory proximity and airflow report 128 degrees Celcius. I am guessing one or more sensores are broken, yes?

OK, no green light for some reason when I left only the 5pins in. SMC_ADAPTER_EN 0v PM_BATLOW_L 0v PM_SLP_SUS_L 0v 3V3_S5 0v 3V3_SUS 0v I was checking a few other things g3h is 8.2v U5110 lloks a bit dodgy and few smaller bits around it

Hi, Bath submerged macbook air, Obvious damage to the backlight circuit and both the lcd connector on the board as well as the lcd cable. Put through crest, replaced dodgy looking bits in the backlight circuit, changed the lcd connector. New io board and flex. When I plug it in with only lcd...

Ok, before doing anything else I tried a software solution. Macs Fan Control seems to be working great. I tied the fan to the cpu core temps. Any way to make the change permanent or this solution is better? BTW all temps displayed in the app are below 35 so not sure why the fan kicks in at all :/

Hi again, Unfortunately the unit is back, high fan and slow performance only this time. 2informaticos I will test the keyboard flex cable, apart of that, any other things I should check? Kind regards, Daniel

All sorted now. Thank you very much for your help!

JohnB8812 Looks like you were right. Found some replacement io board and cable, just the high fan speed now :D I will remember to always check with another IO board! Thank you 2informaticos I will see if I can sort this fan issue now

Hi, This one had liquid exposure towards the centre of the board. At least that's all I can see here Issues: Slow performance Fan High Speed constantly No sound via speakers nor headphones Backlight goes on and off I put it thru Crest cleaner as it was quite dirty After crest sounds seems...