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Whose system do you have? What happens when you try to put the rooms out or operate the landing gear? And are you plugged into shore power or not?
I suspect that the shortstop breakers may have tripped due to low voltage. I am attaching a link to a photo of them. They by code will be less than 18" from the batteries. Copper post and silver post and usually tied together by a copper strip. Small black button you push in to reset them. Many times they have a red cover over them. Pull that off and check those buttons. Hard to see as they are on the end. That should correct this if that happened. https://www.bing.com/images/search?q=shortstop+breaker&view=detailv2&&id=FF1DB9A9E4D0D1A7540EECAAC90C3BA5FC88C3D3&selectedIndex=0&ccid=YM3fXbkk&simid=608042850437172128&thid=OIP.M60cddf5db924d363dd03f6ba05cd33d0o0&ajaxhist=0
If you only have one battery this will keep being a problem. Units with slideouts need at least two batteries and the larger the better. Slidesouts and landing gear take a lot of power and will run one battery down quickly. Try to be plugged in to shore power whenever you can before you operate either of these. That would keep this from happening most of the time. If you don't have a small digital multimeter that would be a good thing to get as you can diagnose most electrical problems with that. About $20 and easy to use.
Could be.........you can jump over them to check this. Or if you have a small multimeter this can be checked. IF you have a battery disconnect switch you need to check that as well. It may be in the wrong position.
Did you push those buttons in? They stay in the same position either way. It just pushes the contacts back inside.
You may have too low a voltage in the battery. If you can find a meter this is easy to check.
Did you jump over the shortstop breakers? Hard to test this without a meter as you don't know if you have good voltage or not.
Yes...........that would speed things up here and we can find out the problem.