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If it says "Firmware version is old," click the button.

How to Fix Delphi DS100E Firmware Update Problems and Get It Working delphi+ds100e+firmware+update+problem+work

Keep the device powered by both the USB port and a 12V source (plugged into a car's OBDII port) to ensure it doesn't lose power during the write. 3. The "Serial Number" Mismatch If it says "Firmware version is old," click the button

If the "Update" button is greyed out or the test fails immediately, your PC likely isn't talking to the DS100E hardware. delphi+ds100e+firmware+update+problem+work

Disconnect from the internet to prevent the software from trying to "call home" and deactivating your license during the update.