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Bad screen. *solved*

dukefawks Thank you for answering. Need too order a new for testing. Will report after.

What is happening here? Bad gpu, mux or lvds ?

https://motherboard.vice.com/en_us/article/the-next-iphone-could-put-15000-repair-companies-out-of-business

What card are you working on? Are you using original 85W charger it is not all cards that auto starts when you plug the charger in

Yeah, sorry that I forgot to mention that in the first post. If it provides that the GPU is the problem is the card ready for the donor box?

The board is to nasty/water damage so i dont think thay will touch it. will look at the buffer circuit.

Have this 820-3332 logic board. What is happening here? have tray`d to replace LVDS connector and resloder the u8900 but still the same. (pictures is taken up/down) Any one with any idea? dukefawks larossmann 2informaticos

PPVCC_S0_CPU is 1.74V Have no history on it. yes som liquid marked around the board. smc area look pretty clean

Have a 820-3437-a logic board thad dont chime when power up have triad pram reset whit out luck also i dont have light on usb mouse. Where to start?

Yes it was a hole in r7105 and it was waiving someting around 90 ohm r7105 still gives 20.40 ohm so i tray to replace u7100 again

What's the resistance between pins 17/18 of U7100? resistance between pins 17/18 is 3,3ohm What's the resistance between pins 27/28 of U7100? resistance between pins 27/28 is 20,2ohm What is the resistance of R7105? resistance of R7105 is fuck hole on. after replace with new i have 20.4ohm...

Have a 820-3437 logic board that won't power up. have orange light on magsafe. ppbus_g3h only give 4,35V Q7130 pin2 16,58 u7100 1 ) 0v 2 ) 16,26v 3 ) 4.41v 9 ) 0,036v 12 ) 3.39v 13 ) 3.39v 14 ) 3.36v 17) 4.12v 18) 4.12v 15 ) 0.028v 19 ) 5.158v 20 ) 5.163v 26 ) 16.35v 27) 16.59v 28) 16.59v...

sorry my fault mean L6400.. have remove u6400 also.

Will try to putt all the missing components back again an see :)

larossmann .... Think i found it L6440 removed an now have 0.377 in diode mode..

I have remove smc, u7000, u5010,u6901, u6990,u7941 a lot off capacitors and resistor i get 2.6 Ohm on pp3v42_g3h.

Never maind I trash it

Sitting with a 820-3115 logic board with liquid damage around u3890 area and j6995. it have short on PP3V42_G3H (i lift the L6995 and injectt 3,2V) but can't find something that been heatet up (i only get 0.23A on the PSU) have also replace the u7000

Thank you Duke. Reason that I removed u7200 was because i have pulsing volt on pin 10(I think it was) The short was on L7260. I found a faulty U4200 replce it and replace U7200. Board is working.