Do a NV Ram reset (OCLP Menu Space Bar) then try a SMC ram reset:
SMC reset on MacBook Pro, MacBook Air and MacBook
For very old models where you can still remove the battery, the reset works as follows:
- shut down mac
- Unplug the power cord from the Mac
- Remove battery from MacBook
- Press and hold the power button for about 5 seconds
- Reinstall the battery
For models with a permanently installed battery, the SMC reset is as described here:
- unplug the power cord
- hold down the following keys at the same time: SHIFT + CTRL + ALT + power