Question about Sylvania DVC850C DVD Player/VCR

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Blinking light labled

Unit stopped working and the light blinks even when power is off. Unit will not play a DVD or VCR tape. It will try to play and then shut down.

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  • Anonymous Jul 27, 2008

    I have the exact same problem..

  • soapbrothomp Dec 27, 2008

    I have the same problem.

  • muzicseeker Apr 14, 2009

    We are having the same issue as above. Blinking light labeled cst. in.



6 Suggested Answers

  • 2 Answers

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Posted on Jan 02, 2017

  • 15 Answers

SOURCE: green light blinks and player will not play dvd or vcr

take it to any repair shop and have them llik it over. It probaly has something stuck in the cassette area. th repair may cost $20 to $50, most of that is what the public calls a "walk in the door fee." If your comfortable doing it yourself just take the lid off and remove whatever looks like it doesn't belong there, like pet hair or something a child could have stuck there, ie a toy or a pen. Hope this helps.

Posted on Feb 01, 2008

  • 20 Answers

SOURCE: help

I fix these all the time, change end sensors and Infra red Diode. Do not attempt unless you Know how ! Diode is under loading deck. Sorry if you are a novice bring to shop! Sorry It is easy only if you know what your doing remember change center IR sensor ( center diode on PC board. Also end sensors (2) one on left one on right side. Do not attemrt if you dont understand ! Hope this helps.

Posted on Mar 04, 2008

  • 1 Answer


I fixed this problem on mine today. I read the manual online and found that CST.IN light means there is a cassette in the VCR. Since I didn't have a cassette in the VCR at the time I suspected a problem with the VCR and attempted to take the unit apart to disconnect the VCR. With the cover off I powered the unit on and a wheel in the back came on until the machine shut off automatically as it has been doing. I was unable to disconnect the wires but after unscrewing most of the VCR mounting screws I tried powering on again and this time the wheel in the back shut off and the unit stayed on. I put everything back together (minus a few VCR mounting screws) and put the cover back on. My DVD player and TV controls work fine now. I put duct tape over the VCR since I don't plan to use it anyway, and I am happy.

I wish this was a better solution that I could say exactly what I did, but I can't. All I know is that it's the VCR that caused the problem and I rarely use mine anymore anyway. And I know nothing about electronic, but I figured that taking the unit apart was better than buying a new DVD player right now. If you feel the same way I suggest you give it a try. Good luck!

Posted on Aug 04, 2008

  • 173 Answers

SOURCE: Magnavox VCR/DVD recorder model ZV450mw8.

You will need a technical person to open the unit. This problem can be as simple as a dirty sensor, or bad tape drive parts, or burned out computer chip.

Posted on Feb 03, 2009

  • 1 Answer

SOURCE: CST In light is flashing green

I had the same problem. Aren't three-year-olds great? Mine had jammed several clothing tags into the VCR slot. Clearing them out didn't solve the problem, but I then took the outer case off (with power disconnected of course) and verified that there was no physical damage to the tape heads and that everything internally was clear. I put the case back on, and everything's back to normal.

Posted on Sep 13, 2009

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Vcr hi-fi light blinking

You just have a dirty main video head. You can get a head cleaner tape or you can buy a tin of Servisol Video 40.
To clean with the Servisol, remove the top cover of the VCR. You will see a big shiny video head. Spray that head with the cleaner. You can also wipe it over with a cotton bud if it is very dirty. It's a good idea to clean all the surfaces that the video tape touches. If you don't know which, when you first take off the cover with the VCR on power, put a video tape in a press play then watch where the tape runs. Eject the tape, then clean with the spray and a cotton bud. You can even spray the cotton bud and then clean with that if you are not happy just spraying into the unit.
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It sounds as though it's jammed. If you're mechanically inclined you can unplug the unit, take the cover off, and manually eject it. Just look for the motor that drives the load basket and manually spin the shaft. The guide-posts should retract towards the tape and the basket will then lift and eject. Just be aware that whatever bit of tape that's out of the cassette won't spool back in. You will have to do that bu hand once it's out.
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The VCR accepts the tape and starts to play; then stops and shuts off; when you turn the power back on the tape ejects

You have a transport problem, the mechanism the plays, FF or rewinds is not working.

Someone is going to have to open and look at the unit---as simple as a belt off or broken to the idler (rubber or geared) that doe the actual work, finding a shop that will work on a VCR unit is getting hard as most of the current techs have never seen this type of unit.

What I used to do when I opened one was have a old cassette with the tape removed! but the reels inside of it still there--tape off both sides of the cassette where it opens so the sensors on either side do not try to stop the unit from allowing this.

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Feb 16, 2012 | Magnavox ZV427MG9 DVD Recorder VCR

1 Answer

The cst in light keeps blinking how to turn it off


I managed to find a PDF manual for your VCR Combo, However i couldnt find anything to indicate a reason for the Cst in light flashing. I did find however find that the TIMER REC Light flashes if T-SET is pressed for a timer recording, but there is no tape in the DVD/VCR. It also flashes when all timer recordings or One-Touch Recordings are finished. So possibly this could be the light you see flashing.

The PDF can be found Here

Hope this helps

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Mar 01, 2011 | JVC SR-MV40 DVD Recorder/VCR

1 Answer

The function on my dvd/vcr is blinking and because of it, i can't work my dvd/vcr. What can i do to fix the problem?

I had the same problem. We watched a DVD, and the unit worked fine. We went out for ice cream, came back, and decided to watch a VHS. Instead of taking the VHS, the CST.IN light flashed and the unit cut off after a few seconds. We didn't have a VHS in the unit at the time. After cutting the unit back on several times without success, I looked online for solutions. One person said to hit 'eject' 5 times in a row, but that didn't work for my unit. Someone else said there was a lever inside near the power button that ejected the VHS, so I checked that out next. I washed and dryed my hands well, and used my finger to jiggle the white lever. Then I saw that the tray that the VHS sits on wasn't all the way forward, so I gently pulled and pushed it. I'm not sure which of the two actions worked, but my light is now a steady green and my unit is working fine now. I am so glad because we've had this unit for almost 10 years now, and I really didn't want to have to buy a new one!

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2 Answers

VHS won't play, sounds like tape will load then power shuts off.

This is similar or identical to another post, but here is an answer...

Hi, I have a solution you can try.
I had exaclty the same problem. When I tried to play a tape it would load (However, I recall I had to push hard to get the tape to be accepted, which is part of the problem) but would shut off after about 12 seconds, then when I powered back up the tape would eject. Finally I took the unit completely apart and attempted to use it with the covers off. Lo and behold, I found I could play a DVD on the unit without the unit powering off, but only if the room lights were on! If I tried to play a tape it would shut down the unit. So that led me to diagnosing the infrared loading and reel sensor circuits.

Background on that is there is an infrared LED that shines up through a plastic light pipe lens. The light from that LED (you can't see it) should shine on two photodiodes that are on either side of the tap mechanism, plus down through a gear with holes in it on to the reel sensor. When there is no tape inserted the two photodiodes will be illuminated and have about 0.2 volts across them. When a tape is installed the light will be blocked and the voltage goes up to above 2.5 volts across the diodes. You have to check this with the room lights dim as the diodes will respond to that light. When you block the light on either side of the plastic light pipe with your finger (with the unit disassembled) you should see the load motor engage, and it will back off when you take your finder away. For some reason in my unit the light from the LED was insufficient to turn on one of the diodes, and also to pulse the reel sensor when the gear turned. That could be due to component aging, or even if the light pipe started to cloud due to age, I don't know. However I was able to get the thing working...

In short I got the unit working by adding 3 resistors.
To do this you'll have to remove all the covers and remove the main PCB from the bottom chassis, unplug the power supply from the PCB, and the two ribbons going to the DVD unit. But you won't have to take off the VCR assembly, which is a pain. You just need some basic soldering skills, and remember where all those screws go...
First, I adjusted the voltage across the right-hand side load sensor diode to get the diode to switch on and off. I recall that I added 1meg across the diode. So the voltage then went from about 0.5v up to 2.8v from light to dark condition.
Second, I increased the current to the IR LED. I added a 330ohm resistor across the feeder to the LED. I recall that was R511 and was originally 220ohms. That was not quite sufficient to get the reel sensor working reliably. I didn't want to stress the LED by putting too much more current through it so looked for another idea.
Third I added 56k across the reel sensor diode to bring the voltage across it down so it would switch on and off as the reel sensor gear turned.
I now have a tape playing continuously in the unit and it seems ok for the time being. Hope that might work for you too.
Craig Townsend

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1 Answer

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1 Answer

CST In light is flashing green

I had the same problem. Aren't three-year-olds great? Mine had jammed several clothing tags into the VCR slot. Clearing them out didn't solve the problem, but I then took the outer case off (with power disconnected of course) and verified that there was no physical damage to the tape heads and that everything internally was clear. I put the case back on, and everything's back to normal.

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