The corners aren’t cutting and some lines are missing. It seems to be the lines that are at lower speeds. From what I have read on the forums I need to increase my min power % however it is greyed out and unavailable. I am running an Acro 1510 GRBL with a Jtech 7W laser.
That is likely the problem. Paper is white, and white reflects the majority of the light from a visible light diode. Try cardboard or something off-white. Though, when you say the laser isn’t turning on at the corners at all, that’s strange - Is it moving really slowly on those corners? Your acceleration might be incorrectly set.
That is remarkably low - factory settings for GRBL, which is normally used for CNC applications, so it’s really conservative. You can increase that to 100 without any issue at all, and could likely go to 500 or higher safely.
I suspect you have something wrong with your laser or your settings. What is the value of $30 in your controller, and what is the ‘S-value max’ setting in LightBurn in Edit > Device Settings (it’ll be in the lower right of the window).
You could switch to using GRBL-M3 mode, which is constant power output, but it’s going to burn start / end points of anything that is vector marked, and any corners in your design. If you have a diode laser that doesn’t fire until 11% power, something is wrong.