There are two ways to warm the hand mouse pad is not hot:
Method 1: Try to change the USB interface to see if the USB port is in poor contact.
Method 2: Through the previous one has not solved the problem, it should be the problem of the warm hand mouse pad itself, it may be that the line inside is broken or disconnected or a component is broken. If it is still within the warranty period, it can be repaired; If you have overguaranteed, and you will not make it, the value of looking for someone to repair is not much, only to buy a new one, ten or twenty pieces have.