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Re: About VCR power.
This often indicates an error condition of some sort. Has a tape been forcibly removed or forcibly inserted? If so, then mechanism timing or positioning could be out of whack. In regards to timing... often, the cassette carriage, and other mechanicals are gear driven, and if a gear set should jump a tooth or more, timing will be off. Often the gears had marks on them which must lined up according to manufacturer specs.
Other possibilities include: dirty/erratic mode switch (tells the logic circuit the position of the mechanicals), or a bad sensor. Malfunctions in the electronics are still another possibility.
If this is a low-cost VCR, as are most in the last 10+ years, repairs might not be cost effective.
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I believe that the tape must have fowled up and the mechanism has gone haywire and now out of sync. Every video has a mode switch. This tells the electronics what position the mechanism is in. However if the mechanism develops a fault, the mode switch will no longer be able to tell the electronics the true position and thus chaos develops, so the whole thing shuts down. You need to investigate to see if the tape is entangled or damage has occurred.
Sounds like you are having an internal electronical problem. It is most likely the capacitors inside the power supply. You can either replace the capacitors if you are good with electronics, otherwise you will have to replace the power supply. You can search around on google to find another one.
I had the same problem with mine turning off after 3-5 seconds. After much research I found a suggestion that on some combo units the vcr part could have a power supply cutout if it is not working correctly. I tried to insert a tape and found that the tape mechanism would not accept a tape. I used a little bit of force and managed to insert a tape. I then played the tape forwards and backwards and the power stayed on! I ejected the tape and found the TV then worked just fine. The power has now been on for over one hour. I hope this give you another avenue to try and fix your problem.
This is the problem with these combo units. When the VCR has
trouble (this sounds like a mechanical one) it inhibits the TV from
working as well cause they share the same power supply. It needs
a VCR expert to fix ya up.
I tell people all the time not to buy these combo units unless they
really need the conveinience cause you get to throw away the TV when
the VCR goes bad.
I am currently have the same problem . I just got off the phone with the support tech and he suggested unplugging TV for about 5 minutes and if that doesnt work to unplug TV for about 2 hours. He said that may reset the TV . I am waiting now. If it works , I will leave feedback.
if all you want to do is disable the vcr portion turn the set on , install a blank vhs tape it has to be blank or the vcr will try to read it .and the tv and dvd should work fine. this is a timing problem in the vcr deck its not hard to fix but it is a pain.