You may class a frozen PS Vita as:
Blue light on, not turning on
Frozen, PS Button won't do anything
Blue light flashing, not turning on
Please note: This does not fix a bricked console.
To fix this issue, hold down the power button until the console shuts off(if it is a frozen screen), or when the Playstation logo appears. After that, you will be in the debug menu. Click on "Restart PS Vita" to reboot your console.
Just had a Vita with frozen sleep mode, blue light kept flickering on but no screen , restarting by holding the power button does fix it , just hold the power button down until menu comes on. Then select RESTART THE VITA SYSTEM .
Please can you help me i've tried that it doesnt work the home button wont glow blue when i hold the power button it starts but then freezes on the playstation sign what i do you would make my day if you help me fix it