man padėjo šita žinutė kažkuriame forume...

 >I *THINK* that if the green light comes on but no other signs of life 
 >and you've tried all forms of reset, check for one of 3 chips,
 >they are all about 3mmx3mm. and may be covered by screening cans.
 >LTC3411 (marked LTQT) (dc-dc converter)
 >LTC1733 (marked LTLX) (battery charger)
 >SP62000 (marked AIH ) (dc-dc converter)
 >
 >The first 2 are made by linear technology and the last one by Texas 
 >Instruments.
 >
 >these are TINY and need a steady hand to change......
 >
 >it was the sp62000 in a friend's GO that had a tiny hole in it as a 
 >result of a faulty charger.

užteko pakeisti tik sp62000 nes buvo akivaizdžiai išsipūtusi, ir Tom Tom 
One atsigavo. Mikruškę užsakinėjau Lemonoje.
Sėkmės.