Won't advance slides

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You would need to use a meter or test light to find out what exactly is dead. It could be a short in the fuse box, or a bad connection in the harness, or at the battery or starter.
You may need a repair book or shop manual to get the wiring diagrams.
If nothing on the truck works, you would start at the battery cables and work back to the key switch.

The remote is faulty. Time for a new one.

You have a dead battery.
The procedure to fix it is as follows:
1) Charge battery.
2) check alternator belt tension. If loose, tighten or replace.
3) If still no start, replace battery.

1. Does the SELECT button work? If so, hold it & remove the tray (if one is present). Skip to step 3.
2. If the SELECT button doesn't work, remove the slide tray (if one is on the projector) using the emergency tray release in the center hub of the projector. 3. 3. Turn the projector on & try to cycle a few times in reverse. This is how you clear a slide change mechanism jam in the projector.
4. If that didn't work, then either you have a broken cycle circuit wire (usually an orange wire within the projector) or the release wire is trapped under the cycle pad. Refer to the following diagram for the correct "at-rest" position of these 2 contacts. (If you don't feel comfortable doing this, then contact a factory-trained repair dealer).
Good Luck !!

Turn off all other "wireless" devices (cell-phones, wireless telephones, iPhone) in your home, and see if the light on the receiver is "solid" on.

Look under the coach near the slide and look for a pinched or bare wire. Sounds like you have a dead short to ground and could be difficult to find. Check the wiring to the slide motor, could be between the slide switch and the motor. Take a Volt meter and set it to Ohms. With the fuse out check to see if you get an Ohms reading between fuse wire and frame of coach. If you get a reading you have a short. Also check the power wire on the slide motor to motor case. If you get a reading the motor is shoted and needs to be replaced.
Thanks for using Fixya
Jerry

Try the command code switch. I recently had a similar problem when my remote suddenly stopped working. It worked fine one time but nothing the next time I tried it.

I checked the emitter with a digital camera and found it was not working. I did the remote reset (remove batteries and push all the buttons twice, reinsert batteries) and the emitter was now working. However, the remote would still not control the base unit. I did the remote base code reset (push power, volume and TV/DVD buttons together) but this did not help. I then checked the command code switch. This is a small three position slide switch located in the battery compartment on the remote. I slid the switch back and forth several times returning to the default number one setting where it was before. I did not change anything on the base unit but the remote now worked.

Hope this helps.

Actually it might be time for a new battery. The symptoms sound as such. Even if the battery is relatively new, it may still be defective. If you have access to a voltmeter, recommend checking the batteries voltage to that printed on its case.

My 3000 has a green light but it only flashes to indicate the sync period during which time you should press the button on the back of the presenter. The presenter works well and to date I have had no problems.