I need to know the service mode of JVC TV flat screen

it needs service, that means using tools and meters and spare parts to find cause.
dead screen black screened at all times.?
even in HD TV antenna mode for HD TV?
or just the remote CLICKER batteries dead.
tell things that work and no not work , even LED actions.
the maker has no books on this old TV

https://jvcproducts.com/us/contact/support.html

here they are ask them>?

what rare TV. good luck fixing any RARE TV.
moved you to TELEVISION.

Do a reset to this tV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

This indicates that the TV somehow went into service mode, and the colors on your screen are a test pattern. There are a couple things that we can try to fix the issue.

The first, is to try and reset the EPROM in the TV.
To do this, remove the power cord from the wall, then press and hold the power button on the TV itself (not the remote) for 20 seconds. Then plug the set back in and power it up.

If this does not fix the issue, the last thing we can try on a user level, is to use the TV remote, and press Cursor Arrows UP then Down, and unplug power. Then plug it back in.

If this does not cure the issue, then this indicates a failure in the TV's EPROM which is what runs this Test/Service Mode, and there are no resets or adjustments you can perform to fix this. It is actually a fault in the component that generates this test, and the set would require service. There is nothing you can do that would enter the Service/Test Mode as a user, so this likely occurred due to hardware failure.

If your TV is still under warranty you can contact JVC from their service page for repairs below.

I hope this helps!
- Joe


JVC Official Service Providers site Purchase genuine JVC parts and...

Try a hard reset. There are two types of reset to TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. 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/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

There is no external reset button to modern TVs. You have to enter its service mode; to reset it. 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/

Contact the authorized service centre for JVC. It sounds line corrupted firmware. Let them do it right. 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/

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/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

If this is an LCD TV, show a flash light on the screen from a safe distance. If you can see picture, it means the backlights have gone off and the TV might need servicing.

http://www.go-gddq.com/upload/2009_03/09032313026620.pdf
www.scribd.com/doc/.../Sanyo-TV-LCD-Training-Manual
www.scribd.com/.../JVC-LCD-FLAT-Television-LT26WX84-Service-Manual
www.scribd.com/.../282-29-JVC-HD-ILA-Basic-Model-Training-2007
These service and training manuals above show you how to troubleshoot and isolate any problem, and what to do about it, please have a look and download and use all the information, in the manuals and you will soon isolate your issue.