I am having a problem with convergence. I cannot manually make it work. Is this a sign of a bigger problem.

Rotate the zoom control to "T". If you go too far, rotate it the other way. See pages 73 and 74 of the manual: https://support.nikonusa.com/app/answers/detail/a_id/18250

convergence problem, tried with manual color adjustment in the set up menu.

Mine's doing it too. Bad convergence amp IC's. STK392-020

hi. this will be an easy fix for you if you are a good solder. you will need to replace the convergence chip that is located on the PC board(main). this chip is damaged and it has failed due to this damage that has occurred. click below for your new convergence chip(stk).

CLICK HERE

Solution: 
You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kit for your exact model. The kit inlcludes a photo instruction guide, original Sanyo STK chips, convergence resistors, pico fuses, etc. Everything you need to fix it yourself. Its an easy fix. 

Do not adjust any knobs as instucted in the previous thread if you TV have a convergence problem. Doing so will only make things worse. The blog does however show you how to fix other common problems with these sets.

Here are some of the most common symptoms and example photos of a convergence problem

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Hello,
This is a sign that the amplifiers are on the verge of going out since it is able to exert partial control over the CRTs. I would suggest that you try manual convergence, follow the direction in the schematic diagram on how to do this. If this does not work then I would suggest either changing out the convergence amplifiers and all of  their biasing resistors, or having a qualified TV repair shop do the job for you.
I hope this helps,
Thank you,
Shuttle83

Please read my solutions for Tosh "H" line convergence issues.
Check fuses F850,F851,etc.......use STK394-160E upgrade
IC's.....save $.....Use Hitachi kit # X 480293.............Also,
solder wire jumpers on signal board........................T.

Have someone replace the convergence amplifiers

Have you entered "Mute-> 1 -> 8 -> 3" to get to the remote convergence menu? There you can manipulate each color, null convergence, load last saved and make corrections. From this menu you should be able to determine if one or more convergence failures have occured.