@jorgegutier4220 the "rectangle" on the bottom is a complete failure of the connection from the Gate Drivers to the LCD panel. It is difficult to make out the "dark overlay" since the blue screen has some background reflection, but from what it looks like that is an issue with the Source driver. Ultimately what you have here is a bad panel. You would need to check the driver boards, which are the two (or more depending on your model) small boards that are connected to the LCD via some very thin ribbon cables. Those boards are not changeable by the normal DIY'er since we just do not have (or can afford) the tools required for this repair.
Replacing the other boards will have no effect and you will just waste your money.