Question about Tomtom GO 910 GPS Receiver

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TomTom 520 won't start

8 day old TomTom 520 and only working for first 3 days, updated to V7.221 and thats when my problems started. Only display on screen is picture of TomTom unit in cradle with flashing red cirle and white cross inside, also icon in bottom right corner of what looks to be a PC drive unit. I assume it is telling me of a software problem. Each time I connect to TomTom Home it tries to load the update but when disconnecting as advised by the device tab the same error repeats. TomTom support site seems to be down as I can't connect. Help! unit is great when it's working but 3 days out of 8 is frustrating. Tried re-setting but this makes no difference. Unfortunatly I did not back up before the first update so can't restore.

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Re: TomTom 520 won't start

Hi all,
I got the following response to this little problem. Will try it out and hopefully my 520 will work again soon.

To ensure that your device is correctly connected to your PC, please do the following:-

STEP 1 Run the Registry Cleaner Tool

• Disconnect the TomTom and remove any USB devices from your PC, If you use a USB Hub, please disconnect that also.
• Run the RemoveRegEntries tool. You can download it from :-
A Black window will appear briefly then close.
• Make sure that you have got Administrator rights on the PC. Otherwise you may not be allowed to connect new hardware (especially the case when using office computers)
• Reboot your PC

STEP 2 Connect the TomTom

• Make sure the device is fully charged before connecting it to the computer. Ideally a mininum of 4 hours charge.
• Reset the device using a paper clip (see When resetting, keep the reset button pushed in for at least 20 seconds, but DO NOT turn the device back on just yet.
• Ensure that your TomTom has power connected to it. There should be a green light on the TomTom unit. If your device came with a Home Charger, please make sure that is plugged in to the TomTom also.
• Connect the TomTom to a USB port on the back of your PC. We strongly suggest that you use a USB 2.0 port and not a USB 1.1 Port. (USB 2.0 ports are faster USB ports, which are standard on all modern PC's, older PC's and some laptops may still use USB 1.1 ports which are slower and can prevent some USB devices from connecting properly).

STEP 3 Switch the TomTom On.

• On your PC, open My Computer
• Now switch the TomTom On while it is connected to the PC with the green light on.
• Look at My Computer, do any disk drives appear as you switch the TomTom On? If so, which drive letter is it?
• Double click on the TomTom disk.
• What files and yellow folders do you see?, please make a note of them and reply back with what files and yellow folders you see. If possible, please provide us with a screenshot showing all the details.

If the device is NOT listed as a 'Removable drive' under 'My Computer' when you switch the TomTom On, try the following:-

STEP 4 Check Device Manager

• Disconnect the TomTom from the computer.
• It is likely that you have a Firewall on your PC, in some cases, Firewalls can prevent USB devices from being recognized by the PC. We suggest configuring your Firewall and security settings to allow all USB devices to connect to your PC. Once you have done this, we suggest trying the steps above again.
• Go to 'Start' and right-click on 'My Computer' and select 'Properties'
• Select the 'Hardware' tab
• Expand 'Disk drives'. If the TomTom device is shown there with a red cross, right-click on it and select 'Enable'
• Check under 'My Computer' to see if the device now shows up as a 'Removable drive'.

We also suggest it is a good idea to try to connect your TomTom to another PC to see if you get the same problem.

Posted on Apr 01, 2009

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Re: TomTom 520 won't start

The green light comes on on my tomtom 520 when it is plugged in to the power, but the tomtom will not turn on wether connected to power or not HELP

Posted on Jan 12, 2010

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Re: TomTom 520 won't start

Reload or recover yourold details and reload disconnect from device at tomtom home top left hand corner. sorted

Posted on Jan 20, 2009

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Re: TomTom 520 won't start

I had the exact same problem and the simplest solution for me was to:
1) Go onto TomTom Home 
2) Click 'Remove items', then remove the application
3) Once it is deleted from TomTom, just update it as you would normally by clicking 'Update my device'  4) Once that is done disconnect via the TomTom Home screen (Device > Disconnect) 
The TomTom should then load up normally, i think it keeps all data, as mine loaded up with all my bluetooth and phone preferences, even keeping the same vehicle marker i chose!
I hope this helps anyone else with this problem :D

Posted on Dec 30, 2008

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Re: TomTom 520 won't start

Un-install your tom tom software
revert back to the original disc and install the original tom tom HOME
then plug your tom tom back in
install updates , but dont install updated software 2.xx or whatever until you have backed up your data
there is no need to install every little update unless you absolutely need it..verify your updates are from a reliable source and dont try update firmware unless you know what you are false move and your tom tom may not work again..

Posted on Jun 23, 2008

Re: TomTom 520 won't start

I was having the same problem! Until I discovered that there is no SD card inside TomTom 520, just a bit of black plastic! I replaced this with a real SD card and instantly TomTom came to life!
The map and sample music are installed on its internal memory: 64MB of Ram.
Maybe this is of some help.... It did the trick for me....

Posted on Apr 02, 2008

Re: TomTom 520 won't start

Had the same problem. Follow this at your own risk!!!!
I had the same screen (red circle with flashing white cross) and the way I finally cleared it was to use TomTom Home to remove the actual TomTom application from the unit ("Remove Items From My Device", it warns you not to!) and then restored from a back up I did when I first plugged it in to the PC. Not quite sure what you'd do if you didn't have a backup though!!
As I say, it worked for me but it is at your own risk.

Posted on Jan 17, 2008

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Re: TomTom 520 won't start

Go to the following link and try doing a reset on the unit

Posted on Jan 01, 2008

Re: TomTom 520 won't start

Throw it out the window. It helps.

Posted on Dec 27, 2007

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Re: TomTom 520 won't start

Found this page on the TomTom Support site which might help?
They provide a file to download which they state should solve the problem, but only if you know how to "Copy the folder home_images to the root directory of your TomTom device" which I am unable to do because I don't know how!
If anyone can help add to this then please do - I have emailed TomTom directly to ask but have received an email stating they'll deal with my question within 2 business days!

Posted on Jan 02, 2008

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2.Then see if they actually are supplying a new map for the 700
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Ok, here we go:
1: Do a completly backup via win explorer or similar.
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Remember to set win explorer to show system/hidden files.
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Good luck.
More questions, don't hesitate to post them here.
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