Before using the clippers for the first time charge the appliance for 14 hours. The next 3 times you use your clippers, it is important to let it run-down completely. The recommended charging time is 8 hours thereafter. When the charging indicator is red, your appliance is charging.
After every use you should clean the blades using the cleaning brush provided. If necessary you may also use a slightly damp cloth. For more thorough cleaning of the blades some models allow you to remove the blade completely.
On a purely performance level it is important that you lubricate the blades every 2/3 times the clippers are used. Use the lubricating oil supplied or a quality oil that contains no acid (e.g. sewing machine oil). Place a single drop on each end of the blade, operate the clippers for a few minutes and then wipe off any excess oil with a cloth.
After following the instructions in the user manual for starting the appliance, make sure that your electrical socket is working by plugging another appliance. If it still does not work, do not try to dismantle or repair the appliance yourself and take it to an approved repair centre.