iphone problem - help

[starM26]

Hi, I recently sold a Iphone 3GS on ebay. It was fully working order when I sent around 2 weeks ago. Got a message today from the buyer:-

i,m afraid i appear to be having a bit of a problem with iphone it has gone into a mode of turned only off displaying usb cable to i tunes bubble on a blue screen we tried to reset but to no avail and says it needs to restore when connected to itunes but still does not reload can you possibly help many thanks

Any idea why this is happening and what should be done?

Thanks
MS

 

[TurokMakto]

you can do DFU mode when restore the data..but you must connect to internet.try the follwing step :
ensure the phone is off and connect to your computer
1. press home button + power button together
2.after approximate 8-12 second the apple logo will appear
3. release the power button and keep press the home button
4. wait until the logo socket cable + itunes shown then release the home button
5. your iphone will recognized by your computer then you can click dor restore button then start to restore the OS

good luck