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.
Return it to your place of purchase and get something else anything else you wouldn't believe how many people are having Issues with the LT series get rid of it.
Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge)
As a first step , if it is controlled via the remote, check that the remote batteries are good and that it is functioning ok. Does the tv show anything att all? If it does come on but shows nothing then it might be that the source selection is on the wrong kind of source, you can find on the remote whether this is so by going to the source menu which should probably be on digital. (I am assuming that you only have digital broadcasts where you are.
If there is no picture whatsoever ubplug the set and check whether the internal fuse(s) are ok.)
Check its back-light ivnerter board for fault. If you wish to get some details, check the site linked here. Pull up older posts. Check the site in 'Mosaic' view. It will make search easy. http://electronicshelponline.blogspot.com/
The power light is ON, means, the power regulator board is working properly. You have to troubleshoot the main board. If
you're sound in electronics, and wish to get more details, check this
link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic
/ Flip card, can be selected by the drop-down list, by the top left
of the display window, will make surf easy. You can also do a search, by type in the brand name / model
number / IC used, in the search box at the top right of the display
window. google.com/+GopakumarGopalan
How many times this standby/power light blinks at one time
switch ON? Count it carefully. These blinks are fault indication, and known
as blinking codes. From the number of blinks
occur at one time switch ON; you can get an idea about the faulty circuit stage
inside the TV. This will make repair
easy.If you're sound in electronics, and wish to get more details,
check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic
/ Time slide, can be selected by the drop-down list, at the top left
of the display window, will make surf easy. You can also do a search, by type in the brand name/model
number/IC used, in the search box at the top right of the display window.
To know about the exact size of the screw, you must download the repair manual to this set by internet. Its disassembly section will have all details. If you wish to get more, check the site linked here. http://electronicshelponline.blogspot.com/
Pull up previous posts by its left sidebar, or type in the
brand name and model number to of your set, to its search box, and press 'Enter'
or view it in Mosaic / Timeslide option.
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.
