20 Most Recent JVC LT-42X688 42 in. LCD HDTV Questions & Answers


Hi.

To start, this TV should not require service remote to access service menu or adjustment menu.

In service menu also there is not a single reset option, but the technician must set the values one at the time.

About the part purchased, I could not find any JVC 87274RS remote control. Please check the number, include any dash or spaces, and include any info you have on the part, so that we can spread light on this.

About the problem it does not sound like something that "just need a reset" it looks like HDMI port is defective, and you should be entitled to get a technician at home if the unit is still in warranty (check it out).

Here how to get in service mode. You use the standard remote. Do not change values in service mode or you can damage the TV:

ginko_66.gif

I uploaded here a service manual for the 40'' of same chassis.I do not have the 42''. Service mode, most parts and functions are the same. Panel size and frame are different.

Regards.

Ginko.

JVC LT-42X688 42... | Answered on Feb 22, 2018


Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

JVC LT-42X688 42... | Answered on Jun 16, 2015


the directv needs hookedup to the tv, also the dvd player needs hooked up to the back of the tv, what type of cabling are you using, red/white/yellow or coax (where it screws in) or does it plug in and say hdmi, etc.

JVC LT-42X688 42... | Answered on Dec 12, 2014


Hi
go to input on your remote, click and find the HDMI box and click on that. Then you should be in contact.
kolbrun

JVC LT-42X688 42... | Answered on May 26, 2014


Speaking from experience it's a bad idea. Don't bother, just get a new TV.

If they are cheap here in USA now they should be even cheaper in Dubai.

JVC LT-42X688 42... | Answered on Oct 09, 2012


Assuming this is the same as my jvc 42x788 the small t-con board is near the top of the tv. It's behind the main panel that the other boards are mounted to. You don't have to take that main panel completely off, just take enough screws out to pull it out far enough to reach the t-con board. Also watch for any wires that need to be unplugged to get more room pulling the top of the panel out.

JVC LT-42X688 42... | Answered on Aug 14, 2012


The 5vdc standby is working but not he rest of the power supply, this can be due to bad power supply, main board, backlight inverter board.
Please read my guide to understand what to look for inside.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.

JVC LT-42X688 42... | Answered on Mar 16, 2011


INPUT:
Selects the signal input source for the television: VIDEO-1, 2, 3, 4 or 5 for video devices like
VCRs, DVD players, or camcorders.
Press the V1, V2, V3, V4 or V5 button
Notes:
• When you return to TV mode, press the RETURN+/TV button or direct 10 key pad or CHANNEL
+/- button.
• You can also access by pressing the INPUT button on the side of the TV instead of the remote.
This was taken directly from the manual which you can download and view here:
http://resources.jvc.com/Resources/00/00/92/YA535ien.pdf
Thank you and enjoy,
Lee

JVC LT-42X688 42... | Answered on Mar 08, 2011


Hi , I have the same problem with my LT-42X688,so i called the service of my extended warranty provider . the TV technician just left and told me the motherboard is the problem. he said its the third one this week he has seen with the same symptoms. he ordered the motherboard and i've got to wait 5 to 7 work days before the part will be in . I will keep you posted when the guy will return.

JVC LT-42X688 42... | Answered on Feb 03, 2011


Inspect the fuse, caps, etc in the power supply module first.
If you are going to DIY and have proper tools, electronics knowledge, 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
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

JVC LT-42X688 42... | Answered on Dec 22, 2010


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

http://s807.photobucket.com/home/budm/allalbums

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

Parts: www.shopjimmy.com

JVC LT-42X688 42... | Answered on Jul 13, 2010

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