The U61 error may or may not be related to a problem with power supply capacitors. The problem is more likely related to a problem with the “digital printed circuit board.” If your machine is still within the warranty period contact Panasonic for more information.
If your machine is no longer within the warranty period you may wish to contact the Panasonic Service Centre. Another alternative is to locate a good parts machine.
The “digital circuit board” for the DMR-EZ28, a USA model, is shown in the first photo. The power supply area of the same machine is shown in the second photo.