Yes, it is linked to the CPU.

I appreciate your reply...

When injecting voltage on the 1.8v rail, the very edge of the CPU evaporates alcohol immediately. I think this is game over. Can anyone confirm?

Thanks!

Hi all,

I have this laptop that initially had a short on VBAT

I found that the short was coming from U60600, a DC/DC converter responsible for 1.8v. There was also a shorted cap on pin 13, the LDO for the chip.

Removing these has cleared the short on VBAT. But 1.8v and 0.75v rail read 0.1 OHMS.

I have read another article here that said that this typically indicates a failed cpu.

Is there any way to confirm? I was borrowing a thermal cam and now don't have one to see what heats up on that rail. I feel like I may be wasting my...

Hey mon2,

I really appreciate your reply. In that case, is there anything left to check so I can confirm that the SSD is toast? I was thinking diode readings for the lifeboat rails, but I am not sure...

Thanks again....

Hi all.

Total newbie here. I am very interested in learning laptop repair and would have extreme appreciation for some guidance on an issue I am having here.

This machine was pretty badly liquid damaged. Initially, it was stuck at 5v on the charger. I fixed that by finding a shorted cap on the cd3215 1.1v ldo and reprogramming the TBT rom. From there, the machine went to 20v, but nothing happened. 40ma current draw. I reflowed the smc and the machine powered up. With the lifeboat connector in, the machine will stay at the apple logo for 2-3 minutes and will eventually...