JVC boom box not powering on???

[kaths_hubby]

I bought a like new but used JVC model PC-X250 boom box/shelf system really cheap.It will not power on.I was hoping if someone here had any idea of where to start with it.I opened it up to see what I could see but nothing jumped out at me.I'm thinking it might be the power module itself.Anybody that could chime in would be greatly appreciated.

[Drywall DIY Guy]

Something to try:

Unplug the box for at least 10 seconds. Then plug in and try again. I have had to do this with TV's and other electronics when unresponsive.

[kaths_hubby]

It's been unplugged for sometime now (a few weeks)I reopened it again tonite to have another look around inside.I found a fuse.It doesn't seem to be blown but then again simply looking may not tell you if it is good or bad.I need a fuse tester.It also has a reset button on the box.Tried that too and no go.I appreciate your response though.Any help is better than no help.

[HayZee518]

the power cord goes through a fuse first then on to the step down transformer. output of the transformer goes to a diode pair or a bridge rectifier to change the AC to DC. you need an analog volt ohm meter to test most electronic items. get an el cheapo meter from rad shack.

[kaths_hubby]

OK so heres where I'm at........power cord is good,AC in plug is good,transformer is good,rectifier board is good and the fuse is also good.Now heres where things get strange.After I found out all of the above,I put it back together,plugged it up and mashed the power button.It actually came on.Unplugged and plugged it back in a few more times and after each time it powered on.I even set the clock and a few presets which stayed in memory.I thought OK I'm good to go....... I guess.Took it too work this morning,set it up to listen to it.I mashed the power button and it came on but after a few minutes,the display screen turned to "hieroglyphs".Turned it off and on a few times and then unplugged it.When I plugged it back in.....nothing.So now I'm back to square 1 basically.It must be something to do with the electronic boards.It has 2 inside.1 has a few processors in it with the CD player attached and the other is just basically plugs and wires connected to the mother board. Anybody got a clue/suggestion?

[HayZee518]

there is an IC that is called the BCD converter. it powers the LED segments.

[kaths_hubby]

I appreciate the help.These people at JVC are pretty much useless sorry to say.I have e-mailed them several times and I keep getting a generic e-mail response.Something to the effect of "We have a very short list of parts you can buy.Otherwise see your service tech. where he can charge you a boat load to fix it" kinda thing.If I had a place to buy parts,I would just go with replacing the 2 boards on the inside and be done with it.I'm gonna take them out and see if I can't find a part number somewhere on it.Letcha know how I make out.

[HayZee518]

two places to try - howard sams photofact for schematics and product updates. In this Audio and Video forum, page three, Larry At Approved is a home entertainment tech and may be able to steer you in the right direction.