For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
I don't know exact history. The customer is kind of a weird guy who is really hard to have a conversation with. A man of few words.
It has been in an AASP where they just offered him to replace the MLB. I can not see any corrosion anywhere but when I looked on the board under the microscope I...
This one does not detect internal SSD. It shows the blinking folder icon.
The SSD works in another machine (and no SSD works in this one)
The computer is fine when booted from external USB harddisk
Where do I start ?
Check if Z2_BOOST_EN is high at U5805 while trackpad is connected. If high it should be boosting and could be broken U5805 or bad circuitry around here. Inspect for broken traces and damaged components in booster circuitry. Check if 18V comes on at any point at the 18V5S4 rail.
I got this MBP 17"
It turns off when powered from battery and the charge goes below 70%. After this it can only start again when power supply is connected.
It then starts to slowly charge. It takes long time to get to 100%.
Tried another battery - same symptoms. Cannot start from battery...
I got this 820-2915
White colours on internal display are pink.
- Passes Apples VST (several times)
- External screen works perfectly
- Tried a known working display assembly
- Replaced LCD connector
- Checked continuity from LCD connector LVDS data pins to MUX resistors
- Reflowed GMUX
I just had exactly same symptoms. Double check that you flash correct BIOS revisions. 820-3437-A and 820-3437-B are not same BIOS. It made me fight longer than necessary in this thread: https://www.rossmanngroup.com/boards...mage-on-screen
I got this one up and running after a long and lasting fight. It was the BIOS after all. I missed it because I accidentally flashed an A-revision BIOS but it is a B-revision board. But because the A-revision BIOS made same issues as the corrupted original BIOS it trolled me. After flashing...