Question about JVC RV-B55 Cassette/CD Boombox

4 Answers

Power On Issue

The problem I have is when I turn off the boombox it will not come back on unless I unplug the power from it first. Then it will let me turn it back on. When I do turn it off the light on the screen is still on showing the clock but it will not power back on by pushing the power button. The power cord has to be pulled out before you can push the power button to make it come back on. For now I just leave it on all the time. Any help or suggestions would be great. Thanks

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Re: Power On Issue

My boom bladder dose not turn off stand by wats the problem

Posted on May 13, 2013

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Re: Power On Issue

Me too. Do anyone know where the backup-batteries is placed in the boombox?

Posted on Nov 08, 2009

Re: Power On Issue

Had someone tried to put in new backup-batteries? (3x AA)

Posted on Aug 04, 2008

Re: Power On Issue

I have the same damn ERROR-.- . I didn't find anywhere an answer. -.-

Posted on Jul 15, 2008

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If "PROTECT" appears on the display: Immediately unplug the power cord, and check if anything blocking the ventilation holes on the back of the system after "PROTECT" disappears. After you have checked the ventilation holes and found to be all right, reconnect the power cord, and turn on the system. If the issue persists, contact your nearest Sony dealer.

The above is from the manual at

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Ikasu dvd boombox -no sound

If you have power to the unit but no sound, chances are the audio output ic has shorted causing a load, turn volume down, power off, remove speaker wires, power on, if standby light stays on audio output ic needs to be changed. If however the standby light changes or goes off it indicates a short in the wires or speaker issue, hook up one at a time to identify the problem one.

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Unit will not work on AC power but does on batteries. Power outlet is good, power cord is good. Are there any external resets on the unit.

Not unless you see something labelled so - but power supplies don't tend to work like that!
It's either power supply circuitry thats died but it may have a replaceable long life internal fuse which a workshop (repairer) can replace, and should be real cheap to do.
Otherwise, for indoor use, to save on batteries, get a universal AC to DC adaptor. I think you'll find it has a DC IN socket somewhere about it (back or sides)

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My Emerson 5812 Boombox will not turn on all of a sudden. I just bought it a couple months ago and it will not power on.

If its still under guarantee then take it back to the shop if you have the receipt. If not then it could be something as simple as a little glass fuse inside the boombox.

May 21, 2010 | Emerson (PD5812) Radio/CD Boombox

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NB 90 will not power on after turning off unless i unplug it.

yes a little groove under to big batteries. AA i think

May 14, 2010 | JVC RV-B90 Boombox

3 Answers

Hi...every time I turn off my RV-B90 I have to unplug it and plug it back in before I can turn it back on. Any fix for this?

This was happening on mine and here is how i fixed it.

I would hear clicking from the cassette area when i first turned it on, and the door would be jammed and i had to brute force it open. The kaboom would not shut down by using the power button or remote. Nothing!

I found the tape mechanism was getting jammed out of place because of all the gunk so I cleaned the inside with isopropyl alcohol and a q-tip then moved the mechanisms back and forth with my finger on the bottom where the tape goes over the sensor.

I powered it up with no clicking and was able to shut it off with the power button and remote again. My power issues had to do with the tape player whodathunkit.

Apr 19, 2010 | JVC RV-B90 Boombox

1 Answer

When I press the power button to turn the unit on,

Check your cord first, make sure it's in good shape. Sometimes the main transformer goes out, and you can use a DC adapter to bypass the 120 V source. Could be a fuse, or something else in the power supply inside the unit.

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Emerson PD6810 CD Boombox

power problem with transformer or faulty function selector switch or lock up , but try to see to make sure the selector switch is not on cd , if that don't work then unplug for a little while then try, if that don't work it will have to be tested to determine the problem

Oct 11, 2008 | Emerson PD6810 CD Boombox

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Overall Problem - Panasonic RX-ED707 won't work properly at all

only 1 reason for that faults :

there is a flat connects the top panel which has all the controls with the other circutes in the stereo...
so you have to open it and care for the cd unit it damage easily then check the flat for loseness or cuts
it happened to me also and that works perfectly
good luck

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