although your direction sound simple, but its need a lot of googling,
wish me luck, 1st need googling on how to extract RUU

If  i just turn on by power on, then after second start up it will go to permanent grey.

If i vol up + on, the LED (charging LED) flash continuously while screen remain total black.
May I know what should I expect after this?
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Hehe, supposely vol down+ ON

Now i manage to get to bootloader just error of no image. will redo the PD98IMG.zip tomorrow. sleep for now.

I would love to know this one too, since never tried jelly bean on DHD.
I bet ICS would still be the winner 
  the error of 'no image' or 'wrong image' is part of the process!       
just need to be patient, and wait a little longer. should finish that yesterday if i'm not quickly remove the battery when the word 'wrong image' come out!

Now, my found phone just like NEW again!

Thank you darnvil the evil! 

May I know how to root the DHD now? Proceed again with aahk or ???
p/s: in the mean time of my DHD half brick, i bought another phone. now kinda feel of waste. my DHD just come back to life.

aaaaaaa..... visionary    that sound familiar
i ter'bought'

don't know how to compare with iphone, never use that thing!
when swipe, feel like 2 thousand flying! expensive!
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seem rooting with v14 hang,
maybe because my DHD don't have a sim card!
well, will solve it tomorrow!

just manage to root back the device by AMT ,
not sure why it acn't be root by visionary anymore 

then, some jelly time .. seem R31 is out already!

fellow seniors, i have a question here. my dhd volume button peel out & no function and was covered under warranty, when i got my unit from courier today, it's states there on my slip under the warranty status column, yes for both failure of touch panel function abnormally as well as wlan / wimax malfunction and it's repair recommendation is to replace lcm (lcd) and also rigid-flex board (fpc board), with three other column empty, which is the replace item, qty, and customer reply column.

what does that mean? does it mean that the later figured problem had been fixed? or do i need to send it over to plaza berjaya again for claiming this warranty? if so, there would be no charges right? kindly please advise. appreciate it lots.