Radio Cover won't stay closed

Input the correct code when it asks for it.

It has spark and fuel when the fuse is blown too?

Wiring schematics are your best friend at this point. Locate the ground circuit for the stereo (first on the schematic, then physically on the vehicle). For a component to receive "partial power" but not function as intended, the ground circuit is the best place to look. A corroded ground or a splice or crack in the ground wire should be the cause of your problem.

Those are all really common symptoms of the alternator going bad on those cars. I would have it checked to make sure it's charging properly.

Do courtesy lights come on and go off when you open and then close the drivers door?

if courtesy lights work as expected then the BCM is communicating properly with the door control module, i.e. it knows the door was opened and closed, so likely the problem is between the the BCM and the radio (low speed comm bus) or the radio itself.

A scanner capable of presenting the BCM, door control module, and radio states will likely be required to determine the fault location.

is the CEL/MIL indicator lit?

Do you mean 1.7L? I do not see a 1.6L in the manual. Instructions from autozone.com are pasted below.

lash:

Intake, 0.007-0.009 in (0.18-0.22mm).

Exhaust, 0.009-0.011 in. (0.23-0.27mm)

Civic
1.7L Engine
NOTE Adjust valves only when the cylinder head temperature is less than 100 degrees F.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section. Disconnect the negative battery cable.
2. Note the radio security code and the radio presets.
3. Remove the ignition coil cover. Remove the ignition coils. Remove the throttle cable clamps and harness holder from the cylinder head cover.
4. Remove the cylinder head cover retaining bolts. Remove the cylinder head cover from the engine.
5. Remove the grommet from the upper cover and disconnect the camshaft position (CMO) sensor connector. Remove the upper cover.
6. Set the number one piston at TDC. The UP mark on the camshaft pulley should be at the top, and the TDC marks on the pulley should line up with the top edge of the cylinder head.
7. Using the proper gauge feeler gauge, adjust the valves on cylinder number one.
8. Rotate the crankshaft 180 degrees counterclockwise. The UP mark on the camshaft pulley should be toward the exhaust side of the cylinder head.
9. Using the proper gauge feeler gauge, adjust the valves on cylinder number three.
10. Rotate the crankshaft 180 degrees counterclockwise and bring the number four piston to TDC.
11. Using the proper gauge feeler gauge, adjust the valves on cylinder number four.
12. Rotate the crankshaft 180 degrees counterclockwise. The UP mark on the camshaft pulley should be toward the intake side of the cylinder head.
13. Using the proper gauge feeler gauge, adjust the valves on cylinder number two.
14. Install the cylinder head cover.
15. As required, reprogram the ECM/PCM engine idle characteristics. Be sure all electrical items are OFF.
16. Start the engine. Hold the idle speed at 3000 RPM-s in park or neutral until the radiator fan comes on or the temperature reached 194 degrees.
17. Let the engine idle for about five minutes with the throttle fully closed.
18. If the radiator fan comes on during the five minutes, do not count this toward the five minute programming time.
19. Set the clock.

The instrument panel cover (and therefore the radio bezel) is fastened to the dash frame with snap-clips which cannot be seen with the instrument panel cover installed. To remove the instrument panel cover and gain access to the radio cavity, remove the radio fuse from fuse panel located on the driver's side of truck (the one that has a thumbnail opening and is triangular shaped), visible when you open the driver's door. Then set parking brake all the way down, put key in ignition and turn to "on" but not "start" and put gearshift into "L" position.
The snap-clips are located at the upper right corner, lower right corner, upper left corner, lower left corner and a few places in between, behind the dash cover over the instrument panel. You don't need any tools, just put your fingers on the seam of the dash cover and the the dash body, and pull firmly toward you until the instrument panel cover pops out and GENTLY so as not to break the instrument panel cover, continue until the instrument panel cover is loose from the dash and resting on the steering column. The headlight switch, and 4X4 switch (if equipped) remain in the instrument panel cover and will have to be unplugged to remove the instrument panel cover from the dash completely. This is a snug fit, even with the gearshift in "L".
The aftermarket radio bezel will have two screws at the bottom under the radio on the dash frame. Remove these screws, and remove the aftermarket radio from the radio cavity in the dash. The factory radio has two guide pins on the back, and the electrical connector is made into the radio and again in the back of the radio cavity. Simply slide the factory unit into the radio cavity, firmly seat it into the connector and guide pin sockets, and re-install the two screws you took out earlier.
The instrument panel cover re-installs the reverse of removal, and to seat the snap-clips, simply strike the cover sharply with the heel of your hand over each clip location. The dash will pop right back into place, and you will never know that an aftermarket head unit had ever been in there.

I HAD THE SAME PROBLEM ..... ONE OF THE SPEAKERS WAS MAKING SOME KIND OF SHORT CIRCUIT. ITS USUALLY THE BACK SPEAKERS BECAUSE THE WIRES ARE NOT WRAPPED!!

inside the radio is a miniature bulb that back-lights the display, this is true of all radio's, in fact they all use the same tiny bulb, these do burn out from time to time, u will need to remove the radio/CD unit and then pull the top cover off, inside just behind the display u will find a small twist in socket that contains the bulb, u can buy this bulb at any full service auto part's store for about $2

Problem 1: buy a system heater to keep the engine warm at night.
You can buy them at any autoparts store . You take your pick from the variety.
Place a light 100 Watt Bulb near the battery but not too close to anything else where it might burn anything.

Problem 2. Check your coolant level to see if you have the proper level. Make sure you have 1/2 antifreeze and 1/2 water if you add any coolant /antifreeze and bleed the colant system. By running the car let it cool, then turn the radiator cap or turn the bleed screw provided on some cars near the thermostat outlet. Then adding some more water and coolant etc.The tightening the cap or bleed screw. When radiator is full. Check the radiator and and remove any debris that may be keeping the air out.

Problem 3. Will get fixed because your battery won't die.