My toothbrush is charged, but will not turn on?

The battery is most likely dead, replace the device.

This happened to me as well. One long, two short beeps. Incessantly. Only happens when brush is on the charger.

Try this simple fix first. Hold down the SILVER button for 5 seconds while the toothbrush is on the charging base. If the fix works, it will fix the problem immediately like magic.

If that doesn't work, try this:
1) remove brushhead.
2) use screwdriver in the base and turn 1/4 turn
3) push out assembly from the top
4) dry the inside of of the base handle. allow to air dry
5) allow the switch to air dry
6) reassemble

I had the same problem at the beginning of the year. I think i had bought 3 electric tooth brushes and all seemed to cave in within a couple of weeks. My friend recommended going to Macy's to buy one, which I did and it is still going strong. Maybe you charged it for a very long period of time and it overheat the system circuit? I'm not sure but I would recommend getting a new toothbrush.

Turn it on and put it on the charger while still on. This should turn off toothbrush. And it stopped the blinking!

Your electrical socket may be wrongly wired, with polarity mixed up. Try another socket. Also, some electric toothbrushes need to be "off" to successfully charge. Maybe the flasing red light for 10 seconds is telling you the toothbrush is "on" and not accepting charge.

The best tutorial for repairing Sonicare toothbrushes is here:
Repairing your Sonicare
The problem is either a corroded circuit board or worn-out Ni-Cad batteries. Both repair solutions require soldering, but full repair is possible.

Hi!kindly check the battery of your toothbrush if it is good.And check also the charger of your toothbrush.

May be inductive charging, like an electric toothbrush .The toothbrush and the base form a two-part transformer, with the base having one part of the transformer and the toothbrush having the other. When you slide the toothbrush onto the base, the complete transformer is created and charge can flow.