White screen (again!), but please read...
Back story - I bought a MacBook Pro as a little project. Screen was dodgy and the quality (either with or without lines) was dependent on the angle the screen was held/supported at. Managed to do a full restore and is currently running on El Capitan and the condition of the screen was the same.
I then bought and fitted a new LVDS cable (I do a lot of iPad/iPhone repairs so used to this sort of work). However, problem started - White screen of death.
Since then, I have done the following;
1. Connected to an external monitor - all good.
2. Bought another replacement cable - same problem, so that’s three cables and no joy.
3. Bought a second hand LCD from eBay - same problem - it came with a cable, so that’s 4 cables and two LCDs.
4. SCM, NVRAM restarts conducted - no difference.
5. Disconnected/reconnected battery several times - no difference.
6. Put HDD into another MBP, and all good - no issues with screen on other laptop.
1. HDD is good - proved
2. 2x LCDs can’t be bad - symptoms are the same on both.
3. 4x cables - at least one of them must be good, surely.
4. Graphics chip OK as external monitor is good.
5. RAM must be OK as the laptop operates fine on external monitor.
6. Laptop starts up exactly as it should; chimes, screen dimming after initial start up, dimmer buttons work, and all functions work when directed from external monitor.
7. There is absolutely nothing on the HDD with exception of the the operating system, so not clogged up.
So my only assumption is that the screen connector on the board is possibly dodgy. However, even pressing, squashing, wiggling the connector, you’d have thought something would have popped up on the screen, even if it was garbled nonsense. After all, the only thing that was changed initially for a slightly intermittent screen was the cable - no great shakes
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