My built in display is black but external monitor working perfectly?
Hi, i followed this guide to try to fix my wifi problem after updating to yosemite (MacBook Pro 13" Unibody Mid 2012 디스플레이 교체 ) but when i put everything the way it was my built in display isn't working. i thought i have burned something inside my mac because "it wasn't turning on". But it happens that it is turning on and working perfectly on an external monitor. well, i tried to put a flashlight at the back of the display (on apple's sign) and i don't see any image at the display (followed this step from another question from here). Well, i've tried to do the guide again but nothing seems to solve it. I've tried also to reset PRAM NVRAM SMC, tried to just take it of the battery cable and plug it in again... At the system information my mac isn't recognizing my built in display, well at least don't say anything about it (at system report says:
Intel HD Graphics 4000:
Chipset Model: Intel HD Graphics 4000
VRAM (Dynamic, Max): 1024 MB
Vendor: Intel (0x8086)
Device ID: 0x0166
Revision ID: 0x0009
Resolution: 1920 x 1080 @ 60Hz (1080p)
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Well, another thing that i have realized, after performing these steps, when i enter at system information, i can't see my serial number, it shows like: Serial Number : Unavailable . And where is supposed to show the model of the macbook it shows only Macbook Pro and not Macbook Pro 13" Mid 2012.
Well that is it. I really hope you guys can help me to find out what is going on.
Thanks and sorry for my bad english!!