Recent content by Instafixx

5V_SW_LCD is constant 5V 3v3 is 0V throughout

Yes.

Only Charger 3.1V Only Battery 0.3V

Removed the WIFI IC. Short gone. Machine boots now. I get chime and external video but no internal image or backlight . NO IMAGE and NO BACKLIGHT. UP701 was burnt and was replaced . I had to reconstruct trace for EDP_PANEL_PWR_EN. I get 3.3V there very briefly before it goes down to 0V. Tried...

all shorts removed. Still wont turn on.

Device came in with intermittent shutdown and not charging issues. Found R1955 /R1650 / R0620 all corroded. Replaced them. Now the shutdown issue is gone but the charging issue remains. Device shows battery charging when charge connected but the percentage will not increase. Restart the machine...

All findings are with board on desk. Currently 3v3_s2_WLBT_ISNS is shorted. Injected voltage. IC suspected

Did a thermal scan. UE501 was heating up. SMC_FAN line shorted. Replaced UE501 - short gone. UP701 was burst. Replaced. Had to reconstruct a trace as well. But its still the same. Did thermal scanning again now UP710 heating up.

PLT_RESET_L goes high. Tried BIOS too.

Now I find SMC_BC_ACOk is shorted.

PPBUS at 11V pulsing between 11V and 12V. PP3V8_AON is 3.8V Unable to enter DFU with key combinations. Jumper method wont work as S2 lines have 0.3 to 0.5V. PP5v_S2 is 2.3V and pulsing 3v3_s2_LDP is 1.3V Bad CD3217?

Machine turns on now. I get the chime and steady amp draw. even see the apple logo - but no backlight. disconnected the internal lcd a tested on external video. able to boot into Recovery OS . Flexgate is ruled out. Found the Culprit. PPVOUT_S0_LCDBKLT shorted.

Yes 96W Charger. tried DFU restore. no error message but machine still won't turn on.

Yes

Customer Saying that the Macbook had crashed . He tried restoring but the machine turned off. Now when it came to me I don't get anything on screen. PPBUS is 8.6. 3v42 present. PM_SLP_S4 present. Fan spin is normal. Drawing 500-600 amps. Thermal cam shows U2800 and U7400 very mildly heating up.