My HDD corrupted, I reinstall macOS by using Internet Recovery and updated the macOS to Sierra and reset PRAM and SMC(to remove service battery message). Now,
- Power indicator does not work.
- Doesn't sleep after lid close.
- Doesn't wake up after lid open.
- Sometimes doesn't wake up for Any Key press or Power Button Press
MacBook Pro, Mid 2012, macOS Sierra
Best Answer
The process outlined in the article you linked to is incorrect for your MacBook Pro.
For your particular model of MacBook Pro, you really should follow this process to reset the SMC:
I would try doing this and testing to see if that resolves your issues.
[EDIT]
Since resetting the SMC didn't resolve the issue, it's also worth trying a few more troubleshooting steps.
Resetting the NVRAM
Older Macs had what's called Parameter RAM (PRAM), newer Macs use Non-Volatile Random-Access Memory (NVRAM). It may be worth you also resetting this. There's a couple of ways you can do this, but for your model I recommend the following steps:
Note: When you log back in you may need to readjust some of your system preferences (e.g. speaker volume, screen resolution, startup disk selection, time zone information, etc).
Now test the MBP for a change in its behaviour. If you're still experiencing problems, then try booting into Safe Mode.
Boot into Safe Mode
Follow these steps to boot your Mac into Safe Mode:
If the problem is still persistent in Safe Mode, then we should test your hardware with Apple Hardware Test.
Run Apple Hardware Test
Your model MBP uses Apple Hardware Test. To use this, follow these steps:
Note 1: that the extended test will take some time. Take a note of the results and report back.
Note 2: If pressing and holding the D key at Step 3 doesn't work, start again at Step 1 and, at Step 3 press and hold both the OptionD keys instead. This will try and run diagnostics from the internet instead, so you will need to allow more time for it to complete.