well I have.......... so it means you can
Use a screw extractor or easy out.
First of all, you can try using some oil lubricant to try and ease up whatever has made it stuck, however in most cases, you need to unscrew the nut holding the waste onto the basin or bath and replace the whole unit.
The Output is stuck at either '0' or '1'? O/P Stuck at - '1': One input combination is enough (All 1's). So that output should transition from '1' to '0'. O/P Stuck at - '0': 7 combinations possible (000, 001, 010, 100, 101, 110). But only one is enough. Output should transition from '0' to '1'. So 2 input vectors necessary to verify the three input NAND gate stuck fault.
velcro
The adhesive stuck to my hand.
Most of the time it breaks off and you will need to drill it out and replace screew.
Remove set screw. Then tap the rotor with a hammer. The rotor should break free. It has just rusted itself to the axle, due to condensation.
Stale gas. Stuck valves. Dead battery. Critters like mice do a job on wires, upholstery and such. Rusted/stuck brakes.
if you can reach it, drill the center of the screw shaftout, then use an easy out.
Use appropriate sized drill bit to drill completely through the stuck screw and retap the hole if new screw is necessary.
In Sears you can get a special screw remover. Or ask one of your more experienced friends to help you.
You can unscrew your stuck oil filter with an oil filter wrench. If the oil filter wrench does not work, punch a metal rod through the oil filter. Turn the oil filter off with the metal rod.
Blew a gasket, radiator overheated or rusted out or stuck thermostat top 3.
Unscrew the latch. or put oil on the hinges for the latch to move and see if you can move it.
the end of the e cable that's connected to the secondary brake shoe is probaly rusted and stuck and the cable needs replacing,hope the drum is ok.
Oxy aceteline (unsure of spelling) cutting torch most likely.
You can try spraying the rusted parts with a penetrating oil like wd40 or a product designed to loosen rusted on bolts. Let it soak for a bit before trying to remove. In my experience a big hammer is big help.