hi guys....actually....I have gvn 53....my device cannot pre-boot mode....can u help me for do that....I try anything but cannot....my father get this from Thailand....its only be a mass storage.....when plugin to dvd...there's nothing happen....just startup garmin logo....then I check it....found that it cannot detected...when I plug in comp....there u have it....mass storage....then I check again....there's nothing files on it....empty....I download latest fw from garmin site....gupdate.gcd...using garmin cure3....make original firmware....get the rgn file....then try update with update.exe....it cannot detect usb....that's mean.....something wrong.....only mass storage....is there anyway can make it come back to life...I really need ...coz this device is awesome.....can anybody help me....that would be great.....tq