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What happens if I flash an EFI chip with a serial number that's not the original? My issue is, I needed to replace the EFI chip, but the serial number on the chip didn't match whats on the bottom cover. The customer said he had the bottom cover replaced, hence the difference in serial number...

Yep. Thanks for the assist

looks like the gpu is toast. PPVCORE_GPU shorted to ground (mostly, 0.63ohms). Pulled R9398 and R9399 and confirmed short is on GPU side. Going to pull all 30 caps to confirm issue isn't with one of the caps. don't know of any other way to confirm the short on the gpu without pulling the gpu.

yep, the batt. was bad, Thanks guys

Will proceed with batt replacement

Yeah already purchase the tl866. Thanks for the suggestion though.

I Replaced the palmrest for an A1706 (palmrest came with a battery). The battery isn’t charging with a massage saying that I should change the battery. In system info it does stating that it has 18 cycle. Was wonder if the 87w charger for the A1707 works with the A1706 laptop? I’m about to...

Will try the tl866.

Specifically for MacBook pros

Suggestion on a good efi reader/write. I attempted building one but kept getting errors where it doesn’t see any chip I try to read.

That’s my thought also, that I knocked something off. Will check once I get back in town.

Its the 2.8GHz, 16GB version.

No Title I'll do the measurements during the weekend. Going out town. And yes, the GPU is still recognized in OSX, Believe this model is only has the intel Iris pro. Serial number is: C02Q74K6G8WM

never works, even after waking the laptop from sleep. Only the display comes on after sleep.

Same result. Even HDMI isn't working, and doesn't work even after i wake the laptop from sleep and the display starts to work.

Thanks. Confirmed, the display (LP154WT2) is for the mid2015 which is what this laptop is.

Is there a way to tell what model display is currently installed?

Original LCD. Also it was running normally before the transistor replacement, back when I could only power up with either charger or battery and not both. Looking around the transistor area (q7130/35), top and bottom of board.

Well, power issue is resolved. Now got this weird issue where the display doesn't come on until its completely loaded the os, i close the screen to put it in sleep mode, then open the screen before the screen starts to work.

Thanks again guys. Replaced both trans, as i had previously replaced U7100. Fixed and now running as expected.