My LG Flat screen TV, model no. 37LG30-UD has a black or blank space running down the middle of the screen.

It generally depends on how thick the bar is. If it is directly in the center, it is possible that your Time Control/LCD Control board needs to be replaced.

However, there is a chance that the TCON/Control board alone will not fix the issue, and you will need to replace the LCD Panel.

Depending on your initial cost, the presence of a warranty--extended or otherwise--and your willingness to get it repaired, you may want to consider another set.

Expect to pay around $200-300.00 in labor costs to put an LCD panel in, and the cost of the panel can be quite exorbitant.