I have a TomTom Rider 2nd Edition. I need to restore the SD card how can I get this done.

Blown voltage regulator that controls the battery
http://compu-sat.co.uk/repairs%20voltage%20overload.html

Open the compartment on the bottom of your TOM TOM RIDER and bellow the memory card slot there is a small hole and with a needle insert on it and bingo the unit shuts-off.

If your TomTom GO/ONE/RIDER is frozen, won’t turn on or does not behave as it should, it can be fixed by resetting or restarting your TomTom device.
A reset will not delete any data from your device, with the exception of SMS messages on TomTom GO500/700.

1. Connect your GO/ONE/RIDER to the power charger. If you have a power charger, use it to power your TomTom GO/ONE/RIDER. If you do not have a power charger, make sure that the battery in your TomTom GO/ONE is fully charged.
   Note: You need to charge your GO/ONE for at least 2 hours using the 12-24V cigarette lighter adapter.
2. Reset your GO/ONE/RIDER. To reset the unit, you simply have to push a straightened paper clip (or something similar) into the RESET hole on the device.
   • On TomTom GO 910/710/510, the RESET hole is located on the bottom of the device.
     
   • On TomTom GO 700/500/300, the RESET hole is located on the bottom of the device with the word RESET right next to it.
     
   • On TomTom ONE, the RESET hole is located on the bottom of the device, with the word RESET right next to it (just below the SD card slot).
     
   On TomTom RIDER, the RESET hole is on the bottom of the device, behind the SD card door. When opening the SD card door you will see the RESET hole on the left, right underneath the SD card slot.
   
3. Your TomTom GO/ONE/RIDER is now reset. Finally, press and hold the power button for 2 seconds.

call tomtom to get the dock replace, after you insure that the dock is getting power. check with ohm meter, should have abut 13.5 volts to the base.

n rare cases, your TomTom device may not start correctly or may stop responding. If this happens, try resetting your device. The only information lost on your device is the clock’s time zone setting. Select your device from the list below to see how to reset it.


Select your device: TomTom GO 940/740/540 TomTom GO 930/730/630/530 TomTom GO 920/720/520 TomTom GO 910/710/510 TomTom GO, GO 300/500/700 TomTom XL IQ Routes TomTom XL (30-Series) TomTom ONE XL TomTom ONE IQ Routes TomTom ONE 30 Series TomTom ONE 3rd Edition TomTom ONE 2nd Edition TomTom ONE 1st Edition TomTom RIDER 1st Edition, RIDER 2nd Edition TomTom ECLIPSE II TomTom DAIHATSU, TomTom ECLIPSE, TomTom TOYOTA Help Not sure which device you have? Type the first two characters of your device's serial number below to find out.



To reset your TomTom device, do the following:

1. Check that the battery is charged properly.
   Charge your device for at least 2 hours before trying to turn it on again. Make sure the charging light on your device is on.
   
   
2. Remove the SD card
   If your device uses an SD card, remove it.
   
   
3. Reset your device.
   Use a straightened paper clip, or something similar, to push the reset button for 15 seconds. See the pictures below for where to find the reset button.
   
   
4. Turn your device on.
   Press the On/off button for at least 5 seconds.
   
   
5. Insert the SD card
   If your device uses an SD card, insert the SD card.
   

The rest button is on the top of the GPS

tomtom ONE and 2nd edition are almost the same unit...one needs a SD card to make the unit work, the other unit has the SD card for optional space

in regard to the map, try: www.tomtom.com/10541

tomtom one 1st and 2nd edition and XL only compatible with SD NOT SDHC, MMC.

Forget TomTom. Go buy this one

http://www.wunderlichamerica.com/mm5/merchant.mvc?Screen=PROD&Store_Code=WA&Product_Code=8600880&Category_Code=

I talked to TomTom multiple times on the phone and had same problem but finally found this. It's better quality and it's available.

TomTom Support
or here

TomTom Support

I experienced the exactly same problem/symptoms with the backup restore function today. After installing the new firmware application on my TomTom Go 510, I did a new backup of my TomTom using the Home Application,  I then attempted to "restore" that backup to two spare SD cards.  The dialog box indicated "restoring," but nothing was being restored. My work-around, which worked great, was to locate the Backup Storage folder on my hard drive, and Drag & Drop its contents onto the spare SD cards (after erasing them).
I'm running the TomTom Home application (v 1.5.106) on an Intel iMac, OSX 10.4.10.