Hi nit,
Thank you for considering Sony Community!
Are you running Windows 10? Were there any updates happened before the issue started? My suggestion is to performSystem Restore to go back to a specific time/date where the unit is working fine. VPCEH25EN/B is a non-U.S. model. We do not have the complete details about specifications and drivers and software.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Regards,
Vincent
If my post answers your question, please mark it as "Accept as Solution"