D.C. landlords are not required to provide or maintain T.V.s, smart home functionality, or other premium amenities. However, some leases (perhaps in luxury building) may include promises from landlords they will fix them.
If there is no lease or the lease is silent about fixing appliances, furnishings, and the broken appliance or furnishing, then landlords does not have to provide or fix it.
If the lease does promise the TV or another amenity, then the landlord must fix it per the terms of the lease. If the landlord violates that section of the lease, the tenant is free to move out or take the landlord to landlord-tenant court or small claims court. There, they may get a court order or perhaps a reduction in rent. Overall, there are not strong protections for tenants if the landlord does not restore these services in a D.C. apartment.