PC sound system is not functioning
The DPM is used as a USB sound device: Open the Sounds and Multimedia Properties dialog box in the
Control Panel. Make sure your PC's sound system is the Preferred device selection. Activate the Use only
preferred devices option.
Recharging batteries is not possible
The DPM is turned on and connected to the PC with download mode activated: Turn the DPM off to start
The DPM can only recharge the rechargable Philips NiMH batteries LFH 9144.
DPM 9450 - User Manual