Let me know in the comments if the link goes down, and I will try to re-upload it. Hope this helps anyone trying to revive one of these older panels!
Official firmware is verified by Sharp. "Repack" files are often extracted from working TVs by technicians for repair purposes (like fixing a boot loop) and may not be signed by the manufacturer. Sharp Lc-32le280x Firmware Download REPACK
If the official site does not list the firmware (often due to the model's age), technicians often use repair forums: Monitor.net.ru Let me know in the comments if the