from what i gathered from the other threads (obviously i don't know how reliable the info is) it sounds like the test only gives two results, negative (not eligible for replacement) or positive (bingo!), and no other details
This is just idiocy, this situation Apple has created. Someone said "I'm glad I got it repaired for free." It wasn't free. You had to:
1. Having problems that interrupted your work.
2. Go to Apple and deal with their absurdly titled "geniuses".
3. Waste time/energy with "testing" a product that's defective.
4. Deal with issues related to replacement, including the worry that the replacement parts are used, are dirty, will fail, or all of the above.
And that's not the end of it, either. The use of "testing" kits indicates that Apple is trying to dodge replacement of their defective parts with their defective parts. Isn't that sad? I suppose the justification is that people are expected to go through this
ritual three times before they get a replacement machine, since Apple never bothered to actually fix the problem.
This "testing" stuff is pure nonsense. Apple hasn't replaced any of these parts with the low-lead solder GPUs to my knowledge, which means every single one of them is defective.
It also means that if Apple has replaced some of them with low-lead (fixed) parts, then everyone who hasn't yet received the fixed part should go immediately to Apple and demand the replacement part!
We don't have to play Apple's games. The warranty was extended to a 4 year period (too bad for those of us who paid for full AppleCare?) due to defective design. If a customer says their defective part is causing trouble, that should be enough. But, this shouldn't even happen! Instead, the defective parts should have been replaced promptly, with non-defective parts.
Apple has shifted the responsibility for its QC onto its customers and is playing games to try to exploit goodwill and naivete. That is simply bad business.