The tv screne picture on my insignia tv is off centered and is split in two

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

sounds like a vertical collapse

Hello
All Insignia TV remotes are not alike. The frequency of infrared rays out from each remote control will be entirely different to each other according tho the model numbers of the TVs and remote controls. A typical model will have same model number of remotes, and the remote you have got is with the same model of your tVs it must work proper. Otherwise you have to buy a new one for your Insignia TV model. you can bought from the authorised service center for Insignia at your town. If you have no access to authoised service center nearby you, just buy one universal remote control, which has set up codes for Insignia. . Check its manual, that it have setup codes for Insignia. OK.

Are there any speakers directly beside/above or below the t.v? If so remove them away from the tv. The magnets in the speakers will distort your picture.

Turn off (if on inadvertently) the closed captioning.

This unit needs to be sent or taken in to a service center for complete testing and service. The lightning strike has caused a component failure, in the main board of the television. This is the board that controls all the functions of the television. The customer service telephone number for Insignia is 1-877-467-4289. You can also go to the website www.insignia-products.com. Go to the customer support section and ask them for help getting you television evaluated and serviced. I hope this information helps you solve your problem.

This television, appears to have had a failure in the mainboard. This is the board that controls the video functions and sound functions. The unit should be taken or sent in to a service center for testing and servicing. The service center will have all the correct service information to determine the problem for you. You can call Insignia customer support at this telephone number 1-877-467-4289. You can also got to the customer support website at www.insignia-products.com. Go to the support section and ask them for help on how to get service for your television. I hope this information helps you with your problem.

This television, appears to have had a failure in the mainboard. This is the board that controls the video functions and sound functions. The unit should be taken or sent in to a service center for testing and servicing. The service center will have all the correct service information to determine the problem for you. You can call Insignia customer support at this telephone number 1-877-467-4289. You can also got to the customer support website at www.insignia-products.com. Go to the support section and ask them for help on how to get service for your television. I hope this information helps you with your problem.

This television is having problems in the tuner section of the main board.The tuner has a problem in the synchronization circuits. This will cause the signal to lose contact with the input circuit and appear to be flashing in and out of control. The television should be sent or taken in to a service center for a complete testing and servicing. The service center will have all the service information to fix the problem. You can call the Insignia customer support at this telephone number 1-877-467-4289. Or visit the website at www.insignia-products.com. go to the support section and give them the model number of your television and tell them the problem you having with the video of your television. They will be able to tell you where to get service for your television. I hope this information helps you with your problem.

The tv has been dropped or banged around, you can try to get a degaussing coil and fix the colors, if you cant pull them back out than it would need a CRT/Picture tube...in other words the tv would not be worth anything.