Not accepting tapes

Your average vcr load motor runs a 6 to 12 v dc and the load carriage will generally have tight spots as it loads.
what you will most likely need to do is realign the load mecanisim and check the mode switch first.
depending on the wear of the unit the load switch may need to be replaced.
Some vcr's also have a habit of jumping a tooth on a cog so it would be a good idea to check and see if this has happened.