Rasplex not booting on start up issue plz help

Evening all after bit of advice my Rasplex has been working fine for a while on my pi3. Yesterday when i went to check it was froze i rebooted it and now it goes passed the rainbow screen now it stays on the Open PHT Screen and thats it like its froze on that and wont boot me into my plex account i left it for a few hours and was the same on that screen . Has this happened to anybody else before or do i need to do a re flash of the SD card if its the pi itself then i wont be buying another only had it 9 months ill proberly get a shield if it is

there are a lot of things you can try for troubleshooting

but its easier to reflash the SD and start fresh as it probably got corrupted