Inserted DSTT and now my DS doesn't work at all !

I have been using the DSTT for a while with no problems. Put some new games on and when I went to turn it on . . . . nothing, I had nothing ! It's like absolutely no power. Put the DSTT in another DS that worked fine and now that one doesn't work. Stupid me tried a third DS and the same thing what ever is on the DSTT has corrupted the DS and now even original games won't work on any of them ??Suggestions ??Cheers

Did you install the latest firmware? There may be a chance your DSTT is a fake.

Yep. I regularly update my firmware. I have had the DSTT for a while and have bought more for friends. I was putting games onto one of there's, he turned it on and nothing. I inserted his into my sons DS, who's was working fine, to see if it was the DS and now my son's DS wont turn on. He then put his own DSTT in and it doesn't even turn on now. I have his and two others that now don't even turn on !!

Hm, if it can power on, but nothing displays, then the DS firmware has been destroyed. Or, if it just won't turn on.

NO power at all. Nothing

Then refund the DSTT if possible, and get a new flashcart (and DS).

So basically it sounds like the four DSTTs my friends boys bought are fake and have corrupted my sons and two of there DS's and they are now no good ! Is the latest firmware destroying fake DSTT's ??? How can I tell if they are fake ?? You mention getting a new flasfcart, what's that ? excuse my ignorance.

The DSTT is the flashcart device. You mean you got four DSTT's each, and each of them corrupted DS firmware? Yes, the DSTT team warned that the latest official firmware would help fake DSTT cartridges brick.