For a long term I have had a B2 with camera and PIR which i set up as a burglar alarm when I am away for a long time.
Pictures are taken and emailed and a buzzer sounds, it also switches on lights etc.
I have been able to VNC into the PI from anywhere in the world to check the camera.
So I have not installed or updated any software for at least 18 months.
I switched it on at the weekend and it did not work.
When it boots up into the desktop a small window is displayed asking me for the password for user pi, I have typed the correct one and it just asks again.
I cant VNC into the machine because it has not completed the power up sequence.
I cant ssh into the PI , connection is refused.
I can ping the machine.
So something has been corrupted.
Does anyone know of anything I can try, maybe editing a file on the boot menu.
I really do not want to start again.
I have tried pressing combinations of F1, F2 etc on power up as stated on responses to a similar problem.