Re: MacBook Air A1466 (820-00164) Problem with SPI?

Upon further checking, PM_SLP_S4_L is only present momentarily after plugging the charger in. It seems like U7501 is trying to power on, resulting in PP5V_S4RS3 fluctuating in a loop. Where should I go from next or should I try resoldering the bios chip?

Re: MacBook Air A1466 (820-00164) Problem with SPI?



Hey, I have checked all the resistors on the EFI/ SPI Lines. They all seems to be up to spec. Checked the PP3V3_sus as well and its present. Still amber light and no POST? Any idea what's next? I have also installed the new u6101 and I have checked the points, doesnt seem to be shorted to one another. Thanks for your reply in advance!...

Re: MacBook Air A1466 (820-00164) Problem with SPI?



Got it, I do have some U6101 on the way however. Will check the resistance around the chips once I install em. This issue points to EFI issue right, hoping that I didn't fry any major voltage lines. Thanks for the reply!...

Hey everyone, I'm here due to my screw up while re-soldering the BIOS chip after programming it to have the EFI lock removed.

[B]Background:[/B]
While re-soldering the chip, some solder came out and bridged the U6101 chip. Without taking note of the orientation, I just took it off making note of the orientation that way. Well, my clumsy hands flipped the chip.

I took a gamble and soldered it back on. Lo and behold, it booted up. No more EFI lock, rebooted just to be sure. So I took it out and doused it with some isopropyl alcohol to clean the flux off. Next...

Re: New Members - please post your introductions here

Hey everyone! Here to seek help fix my screw up for being clumsy.