Sony ILCA-77M2 - Manual (Page 191)

[273] Troubleshooting Troubleshooting Battery pack and power
The CHARGE lamp of the battery charger flashes when
charging the battery pack.
Make sure that the battery is NP-FM500H .
Batteries which have not been used for more than a year may have deteriorated.
This phenomenon occurs when you charge the battery pack in an extremely hot or cold location. The
optimum temperature for charging the battery pack is between 10 °C and 30 °C (50 °F and 86 °F).
[274] Troubleshooting Troubleshooting Shooting still images/movies
You cannot record images.
You are using a memory card with a write-protect switch, and the switch is set to the LOCK position.
Set the switch to the record position.
Check the free capacity of the memory card.
You cannot record images while charging the flash.
The lens is not attached properly. Attach the lens properly.
The [Self-timer] is activated.
[275] Troubleshooting Troubleshooting Shooting still images/movies
Recording takes a long time.
The noise reduction function is processing an image. This is not a malfunction.
You are shooting in RAW mode. Since RAW data files are large, RAW mode shooting may take time.
The [Auto HDR] function is processing an image.
The product is compiling images.
[276] Troubleshooting Troubleshooting Shooting still images/movies
The image is out of focus.
The subject is too close. Check the minimum focal distance of the lens.