E1 indicates a fault. First, check the storage environment.
If the device was stored in a low-temperature place, let it warm up to room temperature for at least 15 minutes before plugging it in again.
If E1 persists after that, the device is defective. Do not attempt to repair it yourself, as this voids the warranty.
Call Philips telephone assistance or contact the customer service center in your country. For any checks or repairs, always go to an authorized Philips service center.