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tried a new bios but nothing changed. u6100 seems healthy on my reader r6130 r6131 r6122 r6123 seems ok al bios pins but gnd have 3.3 v

u8300 pin 1 5v pin 2 0v <-- pin 3/ 4 5v pin 6 1.78v pin 7 0v

L8300 1.79 v before and after with the lcd connected pin9 0 volt with lcd connected

pin 7 jumps to 2.66 pin 3 jumps to 3.47 only at magsafe connected or on button pressed

ALL_SYS_PWRGD jumps an instant to 0,4v then back to 0... ugh this is a nightmare

i checked the bios chip. spi_mlb_io0_mos1 spi_mlb_io1_mos0 spi_mlb_io2_wp_l spi_mlb_io3_hold_l are stuck at 50hz.

also slp_s3 pulses for a micro instant but i can detect it only with the oscilloscope

also yes 5vs4 and all the stuff commanded by SLP_S5/4 pulse at button press/magsafe insertion

i just found out that c2436 c2407 c2441 c2401 c2432 have been riped off from the board.. but i doubt they are the cause of my issue

PM_SLP_S4 and s5 goes up to 3.3 for an instant when you plug in magsafe or when you short SMC_ONOFF_L then back to 0. no chanhe on s3 that remains on 0 on the rtc my scope measures the 25mhz but they are not always present. 25mhz present for a sec, then nothing then back and so, 32khz are...

SRTCRST# 3,3v INTVRMEN# 3.11v RSMRST# 3.31v PWRBTN# 3.42v PM_SLP_SUS_L 3.34v PCH_DSWVRMEN 3.34v PM_DSW_PWRGD 3.42v PM_RSMRST_L 3.31v PM_PWRBTN_L 3.42 on normal state 1.02v after shorting SMC_ONOFF_L but once it went to 0.34v

pin 9 0.24v without lcd conmected. 0v with lcd connected pin 28/29/30 5v without lcd connected 1.8v with lcd connected this with 2 different assemblies blinking light on external hdd with osx installed

PM_SLP_S5 completely 0 no pulse PM_SLP_S4 ditto brand new original 85 watt. whole charger not just the cable SMC_ADAPTER_EN = 3.39v PM_BATLOW_L = 3.34v S5_PWRGD= 3.32v

no liquid damage signs anywhere, not dropped. at first all rails were present, cpu becoming warm but no spin. after a bit it went worse. 5vs5 and 3.3sv5 present, but PM_SLP_S5_L so no 5vs4. no corrosion sign anywhere.

no backlight problem as no image at all, caps lock does not go green when pressed, external mouse light comes on

hi, got a 280-3476-A with no liquid damage and reportedly never dropped. i got chime but no image (not backlight problem) not even on hdmi. after a while of being turned on the fan spins like crazy, i never had this behaviour before so what should i look for?

very nice soldering!

brightness stuck at max since you are overriding the pwm injecting constant voltage so frequency is basicaly infinite. works with all configurations only the ic. remember to do the yellow jumpers on the ic pads just plug n play. no software mods. you will lose external display.

All right sounds good. Will test this monday and let you know

I tried this one from an old Duke post https://drive.google.com/open?id=0ByfhQ_x0v-tZYy1WaGhQNTVQME0 But same crap. On Monday I will try the long way with FITC... If i can find it