Is Using 15w Charger With 65w Laptop Safe?

TheAppleKid2011

Honorable
Oct 26, 2013
4
0
10,520
I just got this laptop to work on, and it says on the bottom of the laptop to use a 65w charger (3.4a), however it came with a 15w (1.7a) charger. I'm probably going to sound stupid here but will it overload/overheat the charger? The battery doesn't seem to be charging either...

It came with a broken HDD, which gives me a black screen/doesn't register on both this laptop and another laptop, it also makes a weird noise, but when I try with another HDD from another laptop which I know works, it powers off as soon as I try to load the OS. (The HDD had XP on it and both the laptops are compatible).
Would that be a power delivery problem or just a software incompatibility problem because I know that HDD works and the other one doesn't.

SORRY if this was a bit confusing but help would be really appreciated. Thanks :)