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Board is not powering ON, PPBUS, PP5V_S5, and PP3V3_S5 are present. PP5V_S4 and P5VS4_EN are not present.
I have bypassed the SMC. I could see the fan running at high speed for few seconds and repeating. And the PP5V_S4 is also present. Can I know how can I proceed?
Please find attached picture , there are moving stripes vertically and horizontally on the screen.
I have replaced the motherboard and display LVDS cable , still the issue exist, it's not always but sometimes.
The last thing remaining to change is the full display, do you guys think it's...
Before removing the motherboard I could see 20V and 2.80Ampere current. Continues to chime sound (Not very loud) when I open the lid. Sometimes (I think after SMC reset) I can see an apple logo coming and going without backlight.
I have removed the logic board the current/power consumption is...
My a1502 2014 model logic board is not turning on , but fan is running with full speed , no display, no chime sound, Here is the voltage details.
PPBUS_G3H - 12.75V
PP3V3_S5 - 3.350 V
PP3V42_G3H - 3.42V
PP5_S5_LDO - 5.057V
PP5V_S4 - this rail is not stable , it's coming and going every 2 sec...