Question about JVC LT-42X688 42 in. LCD HDTV

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My 42 in tv will not turn on just the blue light blinks then shuts off

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Unplug it for about an hour to let it reset itself, if it still does not work, then you will have to do further troubleshooting inside. Right now only the 5vdc standby circuit is working.
If you are going to DIY and have proper tools, knowledge of electronics and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Posted on Jul 13, 2010

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Posted on Jan 02, 2017

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I have a 42 inch philips lcd tv and it will not turn on. Tried unplugging it for 60 seconds and only the light will blink red sometimes and then blue sometimes. Do I change out the power source


Number of TV have a bad batch of capacitors on the power board. If you look like split mushrooms that is a bad sign. But there are kits if you know how to solder.

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The blue light merely indicates power is getting to the TV. When you press the power on button, the defective power supply shuts the TV down immediately

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Hello, I have a 42"


Sounds like a backlight is out. If its still under warranty, exchange it. First try unplugging it for two minutes to reset the t.v.

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The tv turns on but then shuts down. will not stay on, any ideas why?


If its Sony KDF-42WE655 TV then it has self diagnostic feature and if it gets any problem inside, its red light will start blinking in specific numbers to show an error code.
Let me know how many times its red standby light blinking between 3 seconds interval.

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Bring your TV to eletronics technician. The main power of your TV has a broken semiconductor parts that need to be replace. ( Maybe power mosfet, fuse, transistor, capacitor, etcc ).

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1 Answer

TV turns off and power light blinks unpluged andd still does it.


Likely to be the STK convergence chips causing a protection circuit to switch the TV off. Have you got any onscreen convergence problems (i.e, colour fringes)?

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JVC 42 INCH PLASMA POWER LIGHT BLINKING ONLY NO PICTURE


no kidding? what is the problem so prevelant in this unit? obvious design flaw.

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