Many TomTom models have a startup diagnostic screen that shows information about the unit’s hardware, software, memory, and other details.

The sample image shows the diagnostics screen for a TomTom GO 510.

On models with an SD card, you can use the following instructions to display the diagnostics screen:

  1. If the unit is on, switch it off.
  2. Remove the SD card
  3. Press and HOLD the power button for several seconds.

After a few moments, a diagnostics screen similar to the one shown above should be displayed. The screen will stay for as long as you hold the power button.

Here is some example text from a TomTom GO 510:

TomTom GO (TM) (c) TomTom 2003-2005
Hardware type:              TomTom GO 710
Bootloader version:         4.25
Compiled at:                Feb 28 2006 11:36:20
Memory:                     64 MB
CPU clock:                  400 MHz
Memory clock:               100 MHz
Peripheral clock:           50 MHz
Storage type:               SD Card
Storage capacity:           999936 kByte
Startup mode:               Standby (power off mode)
Device ID:                  XXXXXXXXXXXX
Bluetooth MAC address:      XX:XX:XX:XX:XX:XX
Bluetooth calibration:      36
Touchscreen calib. data:    75 949 124 871
Keys available:             Yes
Battery voltage:            4023 mV
RTC:                        16:59:02

I haven’t found out how to access the diagnostic screens on models that use a hard drive instead of an SD card (e.g., GO 700, GO 910, etc.). If you come across it, please let me know so I can update this page.

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