Question about NextBase SDV-17 Portable DVD Player

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The audio sound is working but the screen is dark black, no brightness. my nextbase model no. SDV185-SD

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Failure of the display drivers. Open to check the voltage to the section of the drivers. this can be even checked if the IC is slowly warming up. If so the the iC is working and the voltage is present.
Now check if the backlight invertor is functioning. If not check the voltage to find the faulty component.
If this is fine and testing good on the coil outputs then the display is faulty.

Posted on Sep 14, 2010

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It is a LCD set and if sound get it in a very dark room and with a flashlight and the set on look to see if you see a very faint image on the screen.

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Jvc model#av27d304. brightness is turned up but pict is still dark. if there is a night scene screen is almost black.also seem to be way to much red have tried to adjust to no avail thanx for ur help


That sounds like the tube tracking is out of tollerance and the auto grey scale can no longer work.
A new tube will fix this problem, so look at replacing the TV.

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The brightness is very dark. Any nightime scene


Your CRT's getting old. Plus dust on lenses don't help much. You have to open front frill (below screen) and back of the TV. Clean up lenses using dry paper towels, do not wet.
In front of the TV after grill remove center cover and locate "black box" that have 6 potentiometers on it that looks like plastic adjustment screws for philips #2 screwdriver slots. 3 of them should read "Focus" These you don't touch. Another 3 reads "Screen". Put some still image on your screen (like paused DVD movie frame). Carefully add brightness in all 3 colors trying to avoid horizontal lines appearance. If lines show up, just turn it back a little. Try to keep color balance looking at the picture.
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The screen is too dark to read anything though the power comes on. i tried to increase the brightness but did not work NEED HELP!!!


Sounds like your backlight or inverter is on its way out. You can pick one up on ebay.  Google how to check backlight/inverter issues with your model.

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Plasma? LCD? DLP? LP? CRT? What is your viewing candy?

I need to know what type of t.v you have and model and everything before i can answer that question, otherwise, i cant answer it for you, sorry friend :)

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1) I own a Quasar TV model# SP 3232A. I have a dark screen but good sound.What are the possible troubles. 2)Is a service manual available for this model


If the screen is dark, then the brightness and contrast adjustment must be poor. Use the MENU key (in the TV or the Remote, either) adjust the brightness and contrast as per your viewing convenience. Service manual for this model is not in my knowledge and you should not try to repair or troubleshoot it by yourself without proper knowledge of the circuit workings inside.

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I have also one liket that and had the same problem.
The connector is moving and the screen changing from black to white but sometimes nothing. I've managed to have the screen back normal but only for a moment.
Now it is dead again.
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If it works fine with only the battery, then the lcd should be fine. Your power adapter might be bad.

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Hi! You may contact Techpoint Phils. They own or is the distributor of Nexbase here in the Philippines. Their numbers are:

2456680, 2456495, 2446446 and their Fax # is 2456971

Thank

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