What is your version of vt75? Mine is vt75D. I removed my battery about 30 second or a minute. Then after i put it back and turn it on. The clock and date displayed just like before but not accurate. Just reset them in setting. Sorry my english is bad😅
Just had same issue but managed to fix it. Remove your battery for a while. 30second maybe. Then put em back. It will show your clock and date. Just reset them in setting🙂chill