Hello . Last night i bought a SH HTC DHD , and had android 4.03 installed on it . This morning i noticed that the battery drained too quick overnight and i thought it's cause of this version of android officially not supported by DHD . I then tryed to 'factory data reset' , thinking that it could be some apps opened in background with uses the battery . After completing the reset , the phone doesn't boot up anymore. I mean , it shows the HTC logo , then 4 coloured lines , then just a blank screen . If i use volume keys , it does show the volume on screen . if i hold 'power' button , it says to keep it pushed 3 2 1 more seconds to restart , but when it reaches to 1 ..nothing happens . I would wish to install his original firmware . How to ? i m a complete newbye and don't know where to start . Please , some step by step instructions ?