Do you have a colored ghost image on your tv screen? Almost like a (bad) 3D effect?
DO NOT THROW OUT YOUR JVC TV!!! I almost made this mistake by reading 'help' forums where everyone was saying you have a bad convergence drive. I actually bought a replacement tv until I stumbled onto the solution, so glad I hadnt tossed my old tv yet.
The solution is an easy fix. Ignore anyone telling you to take it to a service center or to replace the convergence driver. You need to access the service menu on your television by using your remote control:
DRIVE CONVERGENCE Adjustment (Using remote control)
•Use the inner RGB box pattern.
(1)Set the [SLEEP TIMER] key to 0 min.
(2)Press the [DISPLAY] key and thekey simultaneously.
(3)Press the  key to display the RGB box pattern.
(4)Select the R mode by pressing the [DISPLAY] key.
(5)Adjust the R mode to setting as same as G mode bypressing the [CH ]+ / [CH -] key.
(6)Select the B mode pressing by the [DISPLAY] key.
(7)Adjust the B mode to setting as same as G mode bypressing the [VOL] - / [VOL +] key.
(8)Check to see that the cross pattern is white. If thecross pattern is not white, readjust (5) to (6).
That's it, your color is now corrected.
Yes, I know...your welcome.
This isn't your problem? Here's a link for a full service manual.