Today spring-cleaning for two "late" early-intel mid-2012 quad-i7 2,x GHz 15" MBP with my favorite tools: cosmetic brush and kind of politzer-balloon (which comes close to compressed-air).

The MBPs are meant as backup/replacement for my 2008/09 24" iMacs at work, if the iMacs should start to struggle with Win10pro & additional software (unfortunately they prooved to be at their limit just now).
If the MBPs happen to replace the iMacs, they will be Velcro-fixed upon an mStand and inherit the iMacs small USB-keyboard & mouse and both MBP and USB-keyboard get a TPU-cover to stay clean, which is mission-critical.
One of the MBPs came in in fair condition, but the display is flickering for a short period after waking up from sleeping mode. The other one is a bit bruised and battered, but display, logic-board, optical drive and all i/o are ok.
So I swapped displays and found out, that the problem is related to the display assembly, now leaving an MBP in a nearly prestine condition and another, battered one, with a (temporarily) flickering screen, which is otherwise ok.
Guess I'm gonna look for a defective late-2011 15" MBP (there are a lot of them due to the common GPU-failure) to get a replacement display-assembly.
Quintessence:
- I'd like this place also be a place for the "late" early-intels (aka "pre-Retina" Macbooks) too.
- now's time to look/go for a mid-2012 15" MBP (and replacement-parts from late-2011 15" MBP, that suffer from GPU failure)
Anyone here has an idea about that flickering display?
I thinks it's the cable or the inverter. Probably hard to fix ...