Then you will go on and check the circuitry : coils, mosfets, capacitors, inductors, etc. It's important to proceed step by step instead of quickly replace parts like RAM or graphics chip or even the processor, first thing first check if your charger is working. Does your laptop have any issue with the disply, or the power? Start with the basics by measuring the voltage at all the measuring points showed in the repair guide, and come back with all the measures so we can help you fix your MacBook Pro 15-Inch Core i7 2.3 Early 2011 A1286. Depending on the problem it won't be the same approach. Backlight from Sharp has the code begins with DKH/CON, from Toshiba begins with C11/F7C/FZQ, from LG begins with DTP/C3F.Don't jump into the repair book and chip level right away. And starting with iPhone 7g, the backlight from different authorized factories comes with a different code. The touch panel of the screen is oleophobic coated which prevents from fingerprints when using your iPhone. We get this kind of screen from the first level dealer.

It is 100% original from Apple-authorized factories like Toshiba, Sharp, and LG. The only complaint about this quality is that some of the displays are with 1 or 2 scratches but still be welcome by our critical customers who are requiring good quality. No doubt, it is tear down from used iPhone with all the parts 100% original and working perfectly just like an original new screen, it has whatever the original new screen has. The touch panel and frame come together with cold pressed glue and assembled together with the LCD by the capable third-party factory which keeps its excellent quality. The core components (like LCD and flexes) is 100% original pulled from used iPhone while the frame and touch panel is copy. Other components like touch panel, frame(hot pressed), backlight, polarize lens, and OCA is all copy from different factories. It is better than After Market Basic cause it comes with original laminated flexes and the LCD panel.

No doubt, the other components on the screen are all copy. By comparing the brightness and sharpness of the LCD, we found JK is the best quality among them and the second best is AUO. Typically, the LCD screen is from several different factories, the most popular 4 on China market are JK,AUO, LongTeng, and ShenChao. It has sustainable supplying chain in China, and all the components of the screen are copy quality. It is with widely accept major complaint replacements for original parts, which keeps a right balance between price and quality. The following is the full details of each condition.

In Union Repair store, we grade our iPhone screen into 5 different types of quality on the basis of different material assembled.

Board view macbook pro a1286 2011