So here what has happened this evening:
While at home trying to cook for my wife my DHD buzzed and turned white with the HTC logo. Then it froze.
After a while I decided to deal with it. I long pressed the power button unsuccsessfully. I ended up pulling the battery.
On next startup it buzzed four or five times in a row rapidly. Then it froze for a long time with the screen black but lit. (I know it sounds crazy). The screen was "active" but only showed black.
Well, after it froze in this situation I decided to try and restart it a second time. Then nothing. Dead. The battery voltage was 4,84. No problem there. It seems it's not properly connected with the battery somehow. It won't accept a charge either. No red led indicating charging.
I've tried lifting the contact pins a notch, cleaning the connectors. Nothing. It just won't start up/power up. I've tried holding volume - + power on. Nothing.
Part from this I've had issues like a slow respons on lower right corner of screen, bad sound, Wifi problems and a lot of GPS issues. Hmm, maybe not an HTC next time - still I love it. Sorry. Long post.
Any help is highly appreciated.