Question : 90w adapter too much?

Owner of 2 identical HP dv6748us laptops is using a 90w power adapter.  Specs call for a 65w adapter.
Both PCs are acting strangely.  They try to boot, then shut down completey.  one gave a low battery warning before complete shutdown.  They will not restart with or without battteries installed.  I have no way to troubleshoot them.

THE QUESTION IS:  Is this problem(s) being caused because of the 90w adapter being used instead of the 65w adapter called for in the specs?

Thank you in advance,

donnie616

Answer : 90w adapter too much?

Actually changing the jack does not require any soldering but the laptop has to be completely disassembled. Here is one of them with a picture.

http://cgi.ebay.com/HP-DV6000-Genuine-USB-DC-IN-Power-Jack-da0at8tb8f2-/140444710108?pt=LH_DefaultDomain_0

Once you get it apart you can test it to see if that is the problem.