I took the cover off the TV, and can see that under the motherboard/circuit board that there are a couple of screws loose. Looks like they likely hold the LCD in place, which would explain the problem. Unfortunately, I can only seem to get one end of the motherboard disconnected, so I can't get in there with a screwdriver. any suggestions. It seems to be hung up on the end where the CD drawer opens.
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Re: Almost have it
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Often, the mounting designs of these units calls for the screws to be positioned closer to the board edge with two or more at the middle/center. Likewise if the board also holds switches, expect screws to be within the same general area. It may be to your advantage to remove as much as the hardware as logically appropriate (such as CD assembly) to have a better view. Additionally, may I suggest you group the screws as often they are not of equal lengths.
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Have you checked for a cracked circuit board. Very minor cracks in a circuit board may cause a break in the circuit when the boards are flexed slightly. Loose solder joints will also cause problems when boards are flexed or stressed when screwed tightly etc.
The TV has two main sections One is the Audio component. And 2 is Video section. Since they are Separate and not dependent on one another with the exception of synchronization; (matching Voice to the Video), one section may work just fine. The other non-working section in your case is the Video. Over time various internal parts age and wear out from use or hot/cold. In the Video section a series of Capacitors, resistors, diodes, and transistors on a circuit board make up the Video portion of the TV. One or more of these electronic parts are going bad or totally defective. The only solution is a replacement circuit board. Do not waste your money on repairing a circuit board. If you cannot obtain a replacement circuit board, then the Road-star is now a Road Accor.
From your brief explanation I thinks that there is some loose solderings inside your TV. To make sure about it, you just give a small hit with your palm on the top or side or your TV, when it shuts down. Never use any hard material. Use ony your palm. If it comes on atleast for a short period of time, you can determine that there is some loose soldering inside it. As it is a 13" TV, and a small one, you can do it by yourself. Open the back cover, and pull out the printed circuit board inside, anc check for any component for loose contact. If it seems to be, resolder the point by applying a little more solder. Usually, some components of all TVs will heat up while working. Repeated heating and cooling can cause loose soldering contacts.
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maybe you problem is in the circuit board of the tv.loose solder joints.you need a technician to fix the trouble.do not do it yourself,if you have no knowledge in electronics circuitry.lethal voltage is present inside the unit.
Look for any screws that may be connected with the mounting bracket, keeping it attached to the tv. If you cannot find any screws visible then they may be hidden. In this case, try to gently pry away any part of the mounting bracket that looks like it comes away from the tv. This may reveal screws or the mounting bracket may have simply been clipped in.
Remove the back panel and on the left as you open the case there is a fuse 1.25 Amp that is hidden out of line of sight when you look in to the power supply card when it is mounted. If you remove the two screws that mount the circuit board by the left speaker and remove the circuit board and look in between the heat sink for the IC901 transistor and the pair of ceramic block 330 ohm resistors there is a board mounted fuse there that was the problem that I am going to repair now and continue to trouble shoot. The ceramic resistors were also out of range by almost half of their value. May replace those as well. Good luck!
Hello, i have fixed a few of these units, Mainly the problem is, is the crappy design inside, take out all of the screws from the bottom of the unit, be careful when pulling the top cover off cause the battery unit on the side is detachable and could be stuck and u can rip the wires off the system board. now you will see the 2 speakers, take a razor blade and carefully cut away the glue that holds the speakers in, and there may be little white plates with 2 screws that hold the speaker down also. Now take the speakers out and test them on a home entertainment center or a cd player that has red and black connectors for speakers in the back. See if they work first, if they do carefully reconnect the speakers to the motherboard and reseat the connectors back in with ease. try the unit again. if it doesnt work check the solder joints where the connectors attach to the motherboard, sometimes they will come loose. From my expierence with these units is they tend to jam the speakers inside so tight that they eventually stop working, so be sure to only use the connectors to hold them in.
You mean to say is "dead set' .This kind of trouble is in power supply section busted fuse or busted regulator transistor ,or maybe no depected parts only brittle,loose,crack or cold solder joint of the circuit board...
A lot of times the dc jack where you plug the power cord gets loose conections after so many times of use,if that is the case the set nneds to be open and the jack resoldered,sometimes is the ac adapter that is intermitant ,try twisting the wire to see if it makes any difference.If your tv looses power when using batteries you might be looking at a broken board.
If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages.
This is probably a startup problem. It may be as simple as an open
resistor that provides initial drive to the horizontal deflection.
Check for power to the horizontal output transistor. If there is,
check for drive.
Could also be a bad flyback transformer. Another problem might be that the set is in high voltage shutdown, possibly due to a faulty voltage regulator. Check the regulated voltage going to the flyback primary (it should be marked on the circuit board what that voltage should be... 120V-140V in most TV's). If it is too low, the flyback transformer or one of its secondaries is probably loading down the primary input. If the voltage is too low, try disconnecting the secondaries. If the voltage remains too low, try disconnecting the primaries too. If the voltage is then normal, the flyback is bad. A REALLY bad flyback will also blow a fuse. don't leave the TV on too long with a shorted flyback, the h. output transistor can get too hot and probably fry, if it isn't fried already. If the primary voltage is too high, then the set is probably in high voltage shutdown, possibly caused by the voltage regulator.
Good luck, and stay away from it if you haven't done this before. Take it to a lab if it's worth the repair.