No screen, no power on light, but high frequency squeal
I have a Broksonic SC-20145 TV/DVD/VHS combo. when plug the power cable, there is no screen, no power light on, but a high frequency noise continuously. What's the problem? it's something wrong in power supply or other parts? Please email: [email protected]
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Re: no screen, no power on light, but high frequency...
You have a very good idea of what is happening,the power supply is likely being pull down by a shorted component,it could be a regulator or the output transistor.The power supply provides about 5 or 6 different voltages to be use for the different circuits,I gave you two ideas but it could be any of them.Be safe and take it in for service.
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If you wish to record (VHS) off cable :
First connect the co-ax cable from the wall to the input on the DVD/VHS , then connect a second from the output of the DVD/VHS to the input of the TV.
You will need to match the channel (3/4) output and input. There should be a switch on the back of the DVD/VHS.
Tune the TV to channel 3 or 4 to match, To watch DVD/VHS .
Channel selection will be with the DVD/VHS when it is powered on.
TV will tune to channel when the DVD/VHS is off.
alot of DVD/VHS combos have a built in RF modulator. Look for a coax (screw threads) output on the unit and it should be labeld either DVD/VHS OUT or just VHS OUT. If it does not have a combo out then you will need to use the seperate RF modulator.
Your combo unit should have a set of yellow red and white jacks that are labeled DVD & VHS OUT. Connect these yellow red and white to the yellow red and white on your RF modulator, then connect the coax (screw threads) out on the RF modulator to the coax jack on the back of your TV. There is also typically a swich for channel 3 or 4 on the RF Modulator, make sure you TV is on which ever channel you have that switch set to. If your RF modulator has a power light on it, it will usually not come on until your DVD/VHS is sending a signal through it and it is connected properly.
If you have an antenna or cable box, your RF moudulator should have an Antenna or Cable input jack on it that you can use.
On the rear side of your DVP3345VB you should find a bunch of RCA connectors. There is a column on the right side with the title VCR - AUDIO IN - VIDEO IN.
May I ask you to try plug your cable box to this connectors and the DVP3345VB to your TV.
Before trying it, may I ask you to check that you get video directly from the DVP to your TV when playing a DVD or a VHS tape?
With your ear next to tv do you hear the sound of a motor trying to open the dvd door. If so probaly a plastic gear that has failed that opens the dvd door otherwise could be the motor. Just go buy a $30 dvd player and connect to the tv input. not worth repairing and stay away from tv/dvd combos in the future for this reason that your having to expierence now.
It sounds like you may have enabled the progressive scan output on your DVD-VHS combo. This is a correct setting if your TV support it. However most DVD players that support progressive scan will not support an interlaced signal and a progressive signal at the same time.
It would appear that you are using a composite type cable (3 RCA ends. 1 for video and 2 for audio) for this hook up. This means you have two choices.
#1 Look in the manual for the unit for the FACTORY Reset option. Its usually a combination of plugging the unit in while holding the power button or something similar to that. Without a model # I can't help any further with this option.
#2 Use a component video cable (3 RCA red/green/blue) to plug your DVD/VHS player into a compatible input on your HD TV. Your TV will pick up the progressive scan output from the unit and give you back your on screen display. At this point you can go back into the menu and disable progressive scan. And now just reverse the process to plug the DVD player back in using the composite cable.
It should be noted that if you have a progressive scan TV which HD TV's support you will get a better picture if you use the Component video cables instead of switching back to the composite cable. If you decide to use the component cables you will still need to run audio cables though.