Mostly dead
My first Astak Pocket Pro caused the USB port to error out (multiple systems).
The second one was not much better. The work around was to instal a USB-1 port (The issue was
marginally not playing nice with Intels enhanced USB2 driver, which all of my systems had
)
The second (silent release) generation did not have this issue.
Dead (mostly intermittent) HDTV (tuner) in a small one destined for the wifes Sewing Room
Early HDTV converter (w/component out) box that would lockup (appear bricked) if channels flipped fast. Exchanged. The second one did similar until it would not recover (leaving unplugged for 2 DAYS cleared the lock. input/gate left Floating?)
The days of 24+ hours of burn in are long gone for consumer Electronics. ( I
tended more than 1 burn-in room in my career
)