whilst on holiday i downloaded a bad app that always crashed and i ended up with the apple logo problem where it only shows the logo.so when i returned from holiday i did an official apple restore from itunes, and then i then i jailbroke it and it worked until i turned it off.then it did it again, it wouldnt turn on.it reboots ok on an official reboot from a cydia install for example.i have reflashed it 5 times but this always happens on power up.is there a deeper way to wipe it to prevent this happening?
many thanks in advance
many thanks in advance