Magnavox zv450mw8 Walmart VCR/DVD recorder. shuts off
This unit all of a sudden shuts it self off about 20 seconds after being turned on. The VCR has not worked in a very long time. once a tape is inserted it plays for a few seconds and then ejects the tape.
On vcr's if the tape is hard to turn the tape will sense this and reject the tape. Try to get a tape that you can feel turn free eaiser. I would rewind it to the middle of the tape so each side is equal and it would make the tape run easier. If it runs ok then the unit is bad and is too sensitve to the pull on the tape. This is all designed in the electronics and there is not much you can do about it then get return it if you can.
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Sorry I know very little about the dvd side but my experience with several VCRs is they need cleaning sometimes just like audio tape recorders and players need cleaning. Early in my days of VCR ownership the engineer I used was sick of seeing me and taught me how to clean the heads, guides and rollers myself to restore performance and help prevent tapes being chewed. Head cleaning tapes simply did not reach the parts needing cleaning though the the wet type sometimes helped.
A VCR might work normally for several months and then suddenly it would happen again. Sometimes I needed to do a clean several times in a month. I did have a Sharp VCR once and that had something called an idler reel that would "suddenly" need replacing (several times) due to chewed tapes but other than that manual cleaning did the job every time.
Later VCRs were fitted with a self cleaner that worked well and meant there was no trouble for a long time but when the self cleaner became loaded with filth they actually made matters worse.
Matter of interest, I use clean newspaper and methylated spirit for cleaning.
Sounds like a typical Switched Mode Power Supply fault, or an internal thermal fault that is shutting down the power supply, over & over. Really you need to get it serviced. You need to get a firm "Quote" for repair, remember these days repair can often exceed replacement cost.
The problem is that the loading is out of timing by a tooth. This would explain both the attempt to load a non-existant tape as well as the unit shutting down. This unit needs to be disassembled and the belts replaced and the loading mechanism re-timed. I have done many of these with success. While time consuming because the entire unit must be taken apart, it is not a real difficult repair for anyone that has done them in the past. Where are you located so I can make a referral?
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.
the vcr is on threshold of belt life. try replacing (or cleaning with alcohol) the take-up reel belt. The vcr has a built-in time-out feature to protect the video tape. if it takes too long for things to happen, shut-down occurs.
The problem is the tape mechanism is malfuctioning. It trys eather to load or play a tape and a sensor inside tells the microprocessor to shut down this mechanism before damage is done to the tape. BUT sometimes a malfunction causes a damaged tape too. this unit has NO user serviseable parts inside itself, so its time to take this puppy into a repair shop to see if its worth the repair , Unless this units more then a few years old?? then its time to buy a shiny new unit. Good luck