Question about Shinco SDP-1750 Portable DVD Player

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Display light is dark

The display monitor can be turn on when the power on, but the screen becomes dark after that. The image can still be seen but not bright enough. The light adjustment is not working.

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Re: Display light is dark

I have seen this problem before this is caused by a failure of the backlight which provides illumination for the LCD screen. You may also want to check the inverter also since it fails often and interacts with the backlight.

Posted on Sep 04, 2007

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I have a Protron LCD 26" TV model#LT26CIPI...The tv was working great turned it off on night and in the morning turned it back on to sound but no picture just a Black screen...when you change channels

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Usually this is a bad inverter. The best way to check this is to hold the unit up to a very bright light and see if there is a ghost of am image visible and moving, just not bright enough to be seen properly. This means that the display is working, but the flourescent display behind it is not being powered properly, and most LCD displays require a little inverter board to convert the native DC power to AC to light the backlight. inverter boards are cheap if you can find the proper one for your unit. Unfortunately some units have the inverter board integrated into the motherboard of the player, though that is rare. It should be a separate (and thus replacable) component. Good luck!

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When I am watching a dvd with a dark scene it seems to get even darker almost to the point where I cant see anything.The light scenes are fine. Is there a setting I can change

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I have a PVS 1970 portable dvd player w 2 screen for our car

First, If you have a video IN/OUT switch make sure you have video OUT selected. If you have a blank but lite screen, then your display screen is bad. If you have a dark screen, you should be able to look closely and you might see an image, if so then your backlite might be out. Also make sure not to try to power dual screens with a battery. Make sure the adapter is propery rated for proper output voltage. If repair is needed, you contact me through ebay messaging. Search ebay seller " richards_resale". Good Luck!

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1 Answer

No picture on screen


Initially, this would either be a defective LCD panel or its interface. A way to verify is to play the portable DVD using an external video monitor such as your TV. If still gray or blue screen (no video) even in the TV/monitor, then it would be the video interface/circuitry. If the video is displayed, then it would just be the LCD panel display.

If it turns out to be the LCD display, it is very possible that it is a backlighting issue. Most likely, it would be in the inverter and/or CCF (cold cathode florescent) lamps. This is a relatively easy repair by re-soldering. It is perhaps more of a task to open the panel lid/cover of the LCD display.

This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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If you shine a torch into the screen and see the picture then the backlight has gone and needs replacing, although it would probably be cheaper to buy a new dvd player.

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