First download the latest usb burning tool from here http://chinagadgetsreviews.com/downl...-v2-0-4-3.html
then get this firmware https://mega.co.nz/#!dkhXnKqJ!oILur-...RCpY4gqxVv0hHY
now this is the strange part that firmware is for a completely different looking box than my m8 box but it turns out my m8 box is actually an m8s box with an s812 chip and this is why it bricked even though it clearly says m8 for the model number and on top of the box.
so here is how I unbricked it. jumper the pins between the usb and hdmi port (mine had no pins so I just soldered a piece of wire on) then short pins 17 + 18? on the nand and plug the usb cable in..you should here windows detect the box now load usb burning tool and load the firmware file above. now if usb burner has detected the box remove the short from the nand and flash the device. it would fail at about 4% until I removed the nand short then it flashed 100%
after this you can update the box with any m8s firmware!
edit: I just tried again with the jumper by the usb removed and it worked so you don't have to do that bit. just make sure you have a pin or something shorting the nand pins until usb burning tool detects it then remove pin
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