The green charging light comes on when the Tomtom is plugged in but the Tomtom refuses to activate when I press the start button. As soon as I disconnect the power the green light goes off (and still won't start) even after charging overnight.
I had this problem. had it plugged in charging and then pressed the the reset and the power button at the same time for about 30-50 seconds and then after that pressed the power button and so far so good
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The problem was two fold. First the diode D8 was blown and also the power supply chip was blown.
It is a tricky job, using surface mounted components so should not be attempted by a novice but I managed it.
I have a full set of photos etc if anyone cares to try it. I figured -
NOTHING to loose!! so what the heck and just went for it. Taking it
apart was fun! The surface mounted IC was easy to obtain and the total
cost was about £10 plus 4 hours panic labour. If anyone wants the info
just let me know and I will send the photos - but no promises - it
worked for me.I
figured out this ongoing problem. I purchased my TomTom One second
edition 1/20/07 for $395. I was 30 days past my warranty and had the
problem of unit not turning on. Green light came on when charged.
I opened my unit up and found the sw2 micro switch broken. If you press
too hard on the on/off button, this will eventually happen.
I couldn't find a replacement switch so I wired my own switch and it works now.
Connect it to the computer, then try to switch it on by pressing the button for 1-2 seconds. If it switches on, connect to tomtom home, update, and then switch off. Disconnect, then switch on again. You may have to reset it again by pressing the button for 10-15 seconds. I onl had this problem once, after my first download from tomtom home - I think I crammed too much info into its memory!
First , try a re-set through the 'reset' hole underneath the tomtom. 1 quick short press is all thats required. Unlike others suggest , you do not need to hold it in for anything longer than half a second. You should feel the switch 'click' as its a tactile switch. Don't press too hard as you can damage the switch and cause it to lock ON. Once pressed , try turning the tomtom on as normal. Sometimes a tomtom battery can drop below its normal "shelf" voltage ( normal is about 3.8 volts ). A tomtom charger has a protection circuit inside to stop or slow the current it gives out if there is a short. If your battery HAS dropped volts TOO MUCH ( less than 3 volts ) the charger can "see" the tomtom battery as a "short" and the charger therefore shuts down and doesnt charge the battery. You could leave the charger connected and HOPE that the very small amount of current it's putting out will eventualy bring the battery up over 3 volts. Once it is up near its "shelf" voltage ( called shelf voltage as that is the voltage the battery is at 'on the shelf' ie . when its not powering anything ) the charger will begin to charge as normal....... OR ... you can gain access to the battery and charge it from a bench power supply that has voltage and current meters. Once again , once the battery voltage gets something near 3.8 volts the normal tomtom charger can be used to charge it. You caould connect another normal battery to the tomtom battery just for a few seconds ( not recommended and can be a bit dangerous ) if the normal battery is such as a PP3 9v type it should bring up the tomtom battery to over 3.8 volts in a few seconds. The tomtom can then be charged as normal. .............. It is also possible that some internal IC's ( chips ) have blown inside the tomtom and unfortunatly this would require a specialist repair centre to replace them as they are really very very small and are not a normal soldering job. Good luck. ... if this post has helped you or interested you please rate the author.
I have just the same problem. Initially the battery was flashing to say that it was low on charge even when it was plugged in, then it flashed that the battery was empty and switched itself off. When plugged in the green light comes on, but still cannot turn TomTom 710 on. Also it will not connect to the computer.