Panasonic DV Recorder does not power on

If take apart the machine and look at the power board you will find two capaciters that are bulging. These have gone bad. Replace them by heating up the solder and then remove them. Take them to a store like Radio Shack. You can call first...
When your replace them with new ones make sure you have the positive and negative in the right direction (+/-). Take note before you remove the old ones.

Also, you can download new firmware for your machine.