Can't go in recovery mode

[AC Question]

Hi all! I got an Archos 50 Power - Android 5.1
I tried to do a factory reset from the settings menu ( the easy way), now the phone's frozen. goes into erasing or installing mode ( don;t know wich one is it) ant that's it ...i also cannot go into recovery mode, tried volume up,down + power ...nothing.
Is there anyway to flash the phone or do you have any ideas? the thing is that my computer recognises the phone for only 2 seconds and when it enters that erasing mode it considers it unplugged
Maney thanks in advance

 

[belodion]

Did you use the method as described here? http://www.hardreset.info/devices/archos/archos-50-power/