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Ok I received the right screen today I have backlight now but no image LVDS_DDC_CLK/DATA= 0v all R9008, r9009 are with in spec I tested traces to and from the Filter/choke to lvds and from the test points They are all good. I have 95ohms between 17/18 on lvds With screen plugged.

Yes with memory modules removed same issue. it seems that even though I get ALLSYSPWRGD it powers back down it’s like I loose all my enable signals at once

I tried with a clean bios and it has the same issue :(

Ok I just received the replacement u3900 and u1900 May I ask do I need to have the camera plug for these voltages to be present ? I want to go over The power supplies and enables startBig at pin 6 of u1900 and run through all of them before I replace either chip on these boards

Smc bypass does the same it doesn’t seem to respond to bypass

Yes I checked them while fan was spinning all voltages and seem normal for the few seconds of fan spin but abruptly get cut of :/ I will check those pages 71/72 thanks for your help

Hi i have this board and I replaced a isl6259 which had a low PPBUS now I have 12.56v I found the I was missing PP1v05_S5 so I check u7600 area and all measurements where spot on I replaced u7600 and now the fan spins for 10-15 secs I went over the rails in diode mode and none are shorted :/...

Ok the wire didn’t work :(

Yes it also has continuity I was wondering if I should check it under load but I can get under the connector. Any ideas?

Camera issues resolved still no Bluetooth continuity between u3700 U3700 Pin 1 to 23 of j3401 0.00V U3700 Pin 2 to 21 Of j3401 0.00v resistance to ground on j3401 Pin 23 .649v Pin 21 . 642v

the fan spinning high was keyboard I Have replaced Broken WiFi and lvds Connectors and I’m going to redo iSight traces/connector. The only issue I haven’t dealt with is a “no Bluetooth“ I’m looking at the schematics now to resolve this But it’s booting fine and Bluetooth and FaceTime are the...

my apologies it was a cap c8942. That was bringing it down now it chimes but fans spin up full speed immediately.Checked the sensor that are usually knocked off Or damaged but they are intact. I have no keyboard connected as I can’t find one at this moment. I will find one and get back to you

The only visible work done on here is FaceTime area where they ran a trace to the connector. All other s3 and S0 as I remember are pulsing I will test them. I will also retry the bypass mode and it has the same behavior with battery connected. It does charge the battery and the light turns orange

Ok yes I tried to disable gpu still same thanks I will check Check rails again

Hi I have a question. I’m getting a fan spin for about 4 seconds I test PPBUS_G3H 12.55 PP5V_S5=5v PP3v3_S5 = 3.3v PP3v3_S3= pulses 0-3.3v PP5v_S3=pulses 0-5v PP5VS3_ENTRIP = pulsing 0-5v PP5VS3_EN= 0-5v U7000 Pins 28,27 = 20.4 ohms Pins 17,18 = 3.2ohms RTC PCH_CLK32K_RTCX1 =0v...

Sorry 820-2915 :( I still have like 8 of these left

Hi I would like to know what would hold a board from dropping from 1.15v to .959v I have one board that just hangs at 1.15v and second that goes from 1.15 to .685v Neither of these two boot. I have a booting board that works and it starts at 1.15v and then settles at around .950 forgive me if...

I’m sorry it was incompatible screen thank you for your time

Hi I was working on a water damaged board and I relplaced a few items on 5v/3v rail. It chimes now and I have CPU activity mouse flashing. but no display I’m missing J9000 ( pin 3 0v, pin 4 3.3v) LCD_PWR_EN 0v at U9000 and SMC_LID is 3.4v L9080, r9008, r9009, L9004 all measure good so I’m...

well I checked L9010/11 for continuity and they have continuity so I assume they’re good. I wont get external video from this unit as dosdudes gmux disables this feature. I will measure the 38-40 again. Thank you for your help :)