I don't think I posted abou this problem to SER before because it was just a good story the lsst time but the new chapter starts at the asterisks*** Giving the old chapter for the newly added ng.
Old chapter. Bought a Kenwood DVDR, 3875 iirc with Hardrive about 2010. Used it heavily, recording and watching abougt 3 hours each a day, plus a lot of live watching, until 2024 until it broke completely, wouldn't light up.
Bought another one just like it on Ebay, then opened the broken one. Thought it was the power supply of course. Didn't have a meter yet, but looking and found a button, a little block button pointing up from a
1/4" square (with rivets on each corner). Just like Alice in Wonderland or Dorothy on her trip to Oz, I was compelled to push the button, and the DVDR lit up and seemed to work completely. nothing mentioned about it in the owners manual or the wiring diagram or the Repair manual for a similar device by Kenwood. The button was labeled Reset Sw. and it did. I guess they keep these things secret for a reason.
***So I'd installed the "new" one and I've been recording and watching it for maybe 9 months when the picture and sound disappeared on what I was watching, and on every other channel at the same time. Came back a few seconds later. Repeated that a few times over the next day. Then went blank and didn't come back except for a striped red and black screeen for a few seconds. Then all black while the timer kept recording three times a day. They were all black too. (I could still play my prior recordigns and I have about 50 hours of them before I have to put back the original DVDR.)
What does this indicate to you? A failed part? What kind of part? A cold solder connection? Do you think I can find it by looking? Where a part is soldered in? Or a broken trace? Something else? Do y ou think there is a second push-button for this situation?
I don't remember if there is a separate tuner board, but I presume that is the place to look the most. It has both analog and digital but I don't think I have analog to test it with.
New chapter. Then today, I forgot that it doesn't work and turned it on for the 5PM televison and it's been working fine for 30 minutes. All stations of course. Does that change what you said two paragraphs up?