Search results

Hello everybody I have 3 different 820-2828 board with iMac 27" same issue, - sometimes when load OS reboot - sometimes when waiting login password enter reboot - sometimes when working simple app like safari What we tried - known good Video board ( pulled from working machine) 3 different...

Yes if i shut down form OS not power up again when connected Magsafe . But if I force shutdown by pressing power button, when i connected magsafe automatic start. What ever i send it :) Thanks for help every one

Hello there Today I looked again at my computer sorry :( Yes MacOS detect battery and turns on from battery. And you're right, Duke. When we turn off the system from MacOS, the computer does not turn on again when you unplug & plug in MagSafe. Energy setting is looking normal. Interesting...

Hello every body I m working on 820-3115 turn on when charger plug. I tried; Pram reset SMC Reset Known good charger and battery Replaced SMC and ISL Replaced BIOS Tried with no connected keyboard ,trackpad. But nothing change , Shutdown computer normally when pluged charger runs on again...

Yes Duke from donor boards ( also known good SMC tried removed from working board:(

Thank dukefawks and aprendiz . I was replaced ISL and yes you are right duke ACOK is 3.4V . Tried SMC manual reset but nothing change PP3V3_S5_SMC_VDDA = 3.4V PP1V2_S5_SMC_VDDC = 1.2V PP3V3_S5_AVREF_SMC = 3.3V SMC_CLK32K = shows nothing with measure scoop. (tried 32K CLK signal inject from...

Hello everybody I m working on liquid damaged 820-3115 board with no green light problem PPBUS_G3H = 12.26V PP3V42_G3H = 3.48V SMC_RESET_L = 3V SMC_BC_ACOK = 3.4V ADAPTER_SENSE = 3.4V P3V3S5_LL = 0V SMC_ONOFF_L = 3.4V no 5v and 3v enables Tried 5 different SMC,known good Magsafe board and...

Hello everybody Working on this board wtih fan spin&stop loop. I don't know history but worked some one on it. (not liquid sing or like that) PPBUS_G3H 12.6V and stable PPVRTC_G3H 3.3V and stable PP5V_S5 5V and stable PP5V_S3 5V then 0V over again PM_SLP_S5_L is up and down continuos.. but...

Hello I m working on 820-3476-a few months ago liquid damaged and cleaned by another service. Board worked 1 week only then stopped . Machine working only safe mode (when you press shift key machine booting) other way when you see desktop or login screen freeze computer. Tested known good ...

thank you ALB-Repairs i think you should be right because around v-ram guile is strong and cant be clean easy... I ll replace all from donors .

dukefawks is not turning off when Headphone plugged but is you restart or sleep&wake up when connected hp ,internal speakers turn off and HP is working...

Yes dukefawks resoldered first and replaced second time U8900 before touch GPU Its too interesting nobody write any where about this chip replaced worked or didn't work at forums:(

Hello Board was liquid damaged U6201 area and can not boot. Cleaned board and replaced U6201 now boot and load OS. But now headphone only working when machine boot headphone connected. If you disconnect headphone jack after boot headphone cant detect so only internal speaker works. Note: If...

I m working Mid 2012 retina 15" 820-3332-A with random freeze problem when using who application need more GPU power. ASD report GPU problem but you know apple no more replacing boards. Replaced 2 times GPU with new one but now when loading OS freezing and EFI ASD not report error:( ( Chines...

Hello Everyboady Working on 820-2914 with no backlight problem. Some one worked on this board before us and connected PBUS_S0_LCDBKLT_EN_DIV to direct ground so when machine turn on direct start LCD backlight and when sleep computer LCD backlight not turning off. ( but machine working...

When run ASD first time after parts replace ASD nothing show error but fan spins high dukefawks . Run second time ASD give same error but third time no error:( Note: Fan noise and kernel task starts 2-3 min later after machine power on.

Hello everybody; Working on this machine come service with fan noise and %400 kernel task use problem. ASD OS not shows error, ASD EFI shows Th1H sensor is reading above the high limit Checked and replaced, Q5501,Q5503,U5550 nothing change. Where can i check next step? Note: not liquid sign...

Yes dukefawks replaced 2 times known good SSD. ( Already I can install this ssd at another computer)

Thank you aprendiz , connector looks fine already cleaned and resoldered pins. Replaced U4510 and filter capacitors but same issue :(

Hi, When installing OS stop with "check for hardware error " tried several OS version ,different install disks , and know good harddisk but same problem. I can boot with installed OS but this time crash OS when updating or any app installing ASD report is; SATA: SATA PCI Register Test (test...