I believe there were several electoral votes disallowed in the 1872 election because they were cast for candidate Horace Greeley, who had lost the election to Ulysses Grant but died anyway after Election Day and before the Electoral College vote. Most of his electors voted for other Democratic candidates, but three of them cast votes for Greeley and Congress nullified them.
That’s kinda sad.. 1876 seems to have been an interesting year for electors too.
BUT the states appointed them and they voted.
New York in 1789 is the only case I’ve found of a state not appointing it’s electors.