Plug the TV back in. On many models, holding the on the TV panel while plugging it in will trigger the automatic update.
Websites like Kazmi Elecom or Lab-One often host rar archives of software backups for older Haier LED models. Search for your specific motherboard number (e.g., TP.VST59.P83) as many TVs share the same internal hardware and software. How to Install via USB
Use a tool like WinRAR or 7-Zip to extract the contents. You should see a file ending in .bin or .pkg .
If your TV is still functional and connected to the internet, you can check for official OTA (Over-The-Air) updates:
Do you have the printed on the internal green circuit board? This can help narrow down the exact software backup you need.