Use this Image to restore the S3700.
It will over write all previous Spark Images and delete all Settings and Plugins.
Unrar and place the spark folder onto the root directory of a USB flash drive.
Power off the S3700 using the rear power switch.
Insert the USB Memory into the rear USB port and then power up the S3700 whilst holding the "OK" button on the front panel.
When the front panel shows "spark" release the "OK" button and press the right arrow button so that the front display shows LD.
The USB flash drive should now indicate that it is being used and a progress bar is indicated on the front display.
Please wait for the transfer to complete it may take a few minutes.