Packard bell Easynote L4 won't turn on

Are you saying it may have blown its cpu? OMG

Borrowed a mate's multi-meter, power adapter no good. Problem solved.

Bought a new power adapter from ebay (about £15). However, a couple of months later, tripped over the lead while it was plugged in and it wasn't long before the laptop was dead. I had damaged the dc jack and it needed replacing. Bought a new one from ebay (about £5), googled for some disassembly hints, bought a disassembly manual from 9manuals and took laptop apart. Once the motherboard was out I got an electrician friend from work to do the soldering. There are sites that talk you through this step in great detail though (http://www.laptopsockets.co.uk/new_jack_range.htm). This seems to be quite a common problem with laptops, but cheap to fix if you attempt it yourself. Mine has been back up and running again for 6 months now.