Audio Bleed Through

In the last few days, the DVR is acting up. It's an R15, and we've had it about 5yrs, but no problems.  This unit was actually stored for a year during home renovations, but seemed to be working fine when we re-connected.

Today, I noticed that many shows I had taped had 'weather' glitches - just a pop or 2 of a few moments here/there.  About an hour ago, I selected a taped show (recorded 6-7 wks ago) for my son to watch.  While he was watching it, the screen 'pauses', then goes black, & there would bleed through of the audio of the live channel behind the tape.

It has happened a few times throughout the one-hr show, and I'm now playing another show, and watching it happen - just did it twice in a 5 min time frame.

I haven't done a reset yet, but has anyone had this problem and or any suggestions?