Lurker0
Headphoneus Supremus
Occasionally it turns on immediately without pressing the power button when I put a charged battery in.
I just trued to press and hold the power button on my DX90. It turns on, and allows to operare using touch screen. It turns off after the timeout period from the settings, but then it does not turn on again, until I release the power button.
So, it may happen that the problem is not with the power button, but with the USB connector or the power controller. It may turn the device on by an event related to the power source. I saw a number of times when the device turned on by itself when I connected it to a charger. So I'd suggest to try to cleanup the USB port too, not only the power button. |I successfully used a CyberClean cleaning compound to clean up USB connectors on my player, phone, tablet. The Zip Bag is enough.