Where is the cable antenna hole? - Sylvania SRPD442 42 in. EDTV-Ready Plasma Television

The Aquatronics MS1550G is a marine stereo, not an antenna. If you are looking to mount an antenna to your boat, you will need to find a suitable location for the antenna mount and then run the coaxial cable to the location where you plan to install your marine radio.
Typically, the coaxial cable will run from the antenna to a hole or grommet in the boat's hull or deck and then be connected to the back of the marine radio. The specific location and process for running the cable will depend on the type of antenna and the layout of your boat.
If you are unsure of the best way to install your antenna, it is recommended that you consult with a professional marine electronics installer or refer to the installation manual for your specific antenna and radio

The only reason to have an electrical wire going to the antenna is for a motor that raises and lowers the antenna. The antenna cable to the radio is the only wire on the antenna.
To replace the antenna, you have to remove it from where it connects onto the car, then lift it out from there. The antenna and the cable cannot be separated, it's all one piece. You pull the cable off of the back of radio, and tie a strong string onto it, because when you lift out the antenna, the cable will be pulled out from under the dash and to wherever the antenna is situated and out that hole. Now tie the string onto (hope you had a long string, lol) the end of the cable on your new antenna and cable, and stick the end of the cable into the antenna mounting hole. Pull the string from under the dash by the radio and you will bring the cable back into the dash and where you can plug it into the old radio and listen to good old music again !

the cables go in not out.

Remove old Antenna

1. Activate the antenna switch to the up position.
2. Using the wrench or needle-nose pliers, loosen and remove the original retaining nut on the base of the antenna mast.
   
3. Gain access to the underside of the area of the trunk where the antenna is located.
   
4. Remove the bracket or brace that is below the hole and holding the antenna in place.
   
5. Remove the mast.
   
6. Find the motor that controls the antenna mast. Generally, power antennas will have a constant 12-volt lead and a ground lead. The ground lead will be grounded to the panel next to the motor.
   
7. Remove the ground lead from the panel.
   
8. Pull out the antenna coaxial cable.
   
9. Unplug the coaxial from the extension coaxial cable.
   
10. Remove the original antenna coaxial cable. Note the route the cable follows.
    

Install new Antenna

1. Inspect the fender area where the antenna mast will be mounted for rust.
   
2. Clean the area before installing the new antenna.
   
3. Plug the new antenna coaxial cable to the extension coaxial cable.
   
4. Plug the new antenna's coaxial cable into the radio's chassis antenna jack if there is no extension coaxial cable. Tie or tape the string you put on the extension cable to the new antenna coaxial cable. This assures that the 2 cables stay together as you route them to the antenna mount in the fender.
   
5. Connect the power lead of the antenna to the power antenna lead on the radio.
   
6. Connect the 12-volt constant lead to the antenna to a 12-volt source or to the ignition switch.
   
7. Direct the new antenna cable via the same route followed by the original antenna cable on up to the hole in the fender in which the mast will be mounted.
   
8. Ground the ground lead from the motor to a clean metal surface on the metal panel near the mount.
   
9. Insert the mast into the hole. Face the serrated side of the plastic cable on the bottom of the mast toward the motor side. The plastic cable can be inserted freely to about 12 inches and will stop.
   
10. Turn on antenna switch to down position until the plastic cable goes down and catches into the gear mechanism of the drum housing. If the plastic cable does not gear into the mechanism, twist the cable slightly until the cable contacts into the gear mechanism while the motor is in operation.
    
11. Stop the motor after the cable goes into the housing 12 to 25 inches.
    
12. Secure the bracket or strap to the bottom of the antenna mast and to the metal fender.
    
13. Replace the retainer nut to the base of the antenna mast and secure tightly.
    
14. Replace the panel that covers the antenna mount area.
    

Buy replacement antenna mast. Remove old one by unscrewing the retaining cap nut. Turn on the radio & let the antenna cable run all the way up while you pull on it to remove it.
Install the new antenna mast by turning the radio 'off' so the spool inside goes back to its beginning while you feed the cable of the new antenna down into the antenna mast hole.
Once the cable is all the way down, reinstall the retaining nut/cap and turn on the radio to allow the spool to run the antenna 'UP.'... cycle the radio ON and then OFF several times allowing the antenna to move all the way up and all the way down.
That's it!

I assume it is an extendable antenna, if so loosen the ring around the antenna base there are usually like 4 slots on it, after you have removed the ring, have some one turn your car to the accessory mode and turn the radio on, your antenna or what is left should come right out, to install your new one just feed cable down hole and have them turn your radio off you may need to spin the antenna just a touch to let it catch cable, be sure to put your antenna ring back on.

Give these instructions a shot. Might be too generic but might be enough to get you going. Removing Original Antenna
1. Step 1 Activate the antenna switch to the up position.
   
2. Step 2 Using the wrench or needle-nose pliers, loosen and remove the original retaining nut on the base of the antenna mast.
   
3. Step 3 Gain access to the underside of the area where the antenna is located.
   
4. Step 4 Remove the bracket or brace that is below the hole and holding the antenna in place.
   
5. Step 5 Remove the mast.
   
6. Step 6 Find the motor that controls the antenna mast. Generally, power antennas will have a constant 12-volt lead and a ground lead. The ground lead will be grounded to the panel next to the motor.
   
7. Step 7 Remove the ground lead from the panel.
   
8. Step 8 Pull out the antenna coaxial cable.
   
9. Step 9 Unplug the coaxial from the extension coaxial cable.
   
10. Step 10 Remove the original antenna coaxial cable. Note the route the cable follows.
    Installing the New Power Antenna
11. Step 1 Inspect the fender area where the antenna mast will be mounted for rust.
    
12. Step 2 Clean the area before installing the new antenna.
    
13. Step 3 Plug the new antenna coaxial cable to the extension coaxial cable. (On some General Motors and Ford cars you may need an adapter to mate the 2 cables together. Car audio retail stores sell such an adapter.)
    
14. Step 4 Plug the new antenna's coaxial cable into the radio's chassis antenna jack if there is no extension coaxial cable. Tie or tape the string you put on the extension cable to the new antenna coaxial cable. This assures that the 2 cables stay together as you route them to the antenna mount in the fender.
    
15. Step 5 Connect the power lead of the antenna to the power antenna lead on the radio.
    
16. Step 6 Connect the 12-volt constant lead to the antenna to a 12-volt source or to the ignition switch.
    
17. Step 7 Direct the new antenna cable via the same route followed by the original antenna cable on up to the hole in the fender in which the mast will be mounted.
    
18. Step 8 Ground the ground lead from the motor to a clean metal surface on the metal panel near the mount.
    
19. Step 9 Insert the mast into the hole. Face the serrated side of the plastic cable on the bottom of the mast toward the motor side. The plastic cable can be inserted freely to about 12 inches and will stop.
    
20. Step 10 Turn on antenna switch to down position until the plastic cable goes down and catches into the gear mechanism of the drum housing. If the plastic cable does not gear into the mechanism, twist the cable slightly until the cable contacts into the gear mechanism while the motor is in operation.
    
21. Step 11 Stop the motor after the cable goes into the housing 12 to 25 inches.
    
22. Step 12 Secure the bracket or strap to the bottom of the antenna mast and to the metal fender.
    
23. Step 13 Replace the retainer nut to the base of the antenna mast and secure tightly.
    
24. Step 14 Replace the panel that covers the antenna mount area.
    

Hello ruthharris,
I think the antenna is built in :S dunno exactly may be .. btw there is [Antenna] button on the remote control
You can download the Manual of this TV by Clicking Here
Thank you for using FixYa.

put a wire in the antenna hole while radio is on if you get some reception then you know its your antenna do you have sirius if you do it sometimes it runs through your antenna if you dont then check your antenna wire where it connects to the antenna good luck.....