Hi, I have a 1990 Honda accord ran fine sat about a week not it wont
even try to turn the motor over.When I parked it it ran fine battery
seems to be charged good headlights interior lights also tried jumping
it no luck.This car had a relay fit before but after pounding on the
dash it started.This is different wont crank at all.Any ideas of what
the problem may be?Thanks in advance

I checked my Haynes Repair Manual and copied these items from the
section entitled: Engine Will Not Rotate When Attempting To Start:
1. Battery related problems.
2. Auto. Trans. not completely engaged in Park or clutch
not completely depressed.
3. Broken, loose or disconnected wires in the starting circuit.
4. Starter motor pinion jammed in flywheel ring gear.
5. Starter motor faulty.
6. Starter solenoid faulty.
7. Ignition switch faulty.
8. Starter pinion or flywheel teeth worn or broken.

Turn on your dome light. Now turn the key and watch the dome light. Does it
dim to nothing? If so, you've got a bad battery, bad battery cables or a
bad starter.

Have you actually checked the battery for voltage? At room temperature you
should get over 12.65V with a fully-charged battery.

Check out the battery cables and clean all the connections.

Make sure engine ground strap isn't broken or corroded.