my laptop charger is giving 15 volt instead of 19.5 volt...when i connect it on and off in 1 sec..what i do?

[Akshay_28]

my laptop charger is giving 15 volt instead of 19.5 volt...when i connect it on and off in 1 sec..what i do?

 

[jsmithepa]

my laptop charger is giving 15 volt instead of 19.5 volt

At the risk of being Mr Obvious, this is not normal.

...when i connect it on and off in 1 sec..

Don't exactly understand what this means. Please be literal.

what i do?

What happened to it (changed?) BEFORE it worked and now it doesn't?