This campaq laptop has it’s own dc in board which is a good thing if the jack goes bad as the part is pretty cheap. But with this little number the dc-in board lights up fine when not connected to the motherboard and powered on.
Then as soon as the part is connected back with both the power cable and USB data line to the motherboard the power adapter emits sparks in the dc jack. This surmises that it’s the moherboard that’s bad. There are repair services on eBay when searching for “f500 motherboard” – no quotes.