There's a tricky balance in advertising what kind of items should be brought to a community repair event. As soon as you start to list products, there are expectations that those specific items will be fixed. There are no guarantees at a community repair event. So, keep item descriptions broad.
One popular way to describe what people can bring centers on a simple rule-of-thumb. The Fixers Collective have told people they will examine anything they can carry into the event space with their own two hands. Note the choice of words with "examine" instead of "fix" or "repair". Expectations management is crucial towards a drama-free event. Find out if an item has extremely high sentimental (or market) value or personal data that needs retrieval. Part of the repair process can also involve "sliding back" - the act of bringing an item into worse condition than before. Be prepared to manage expectations.
Bring any non-functioning thing that you can carry. Bring your broken, non-functioning things: electronics, appliances, computers, toys, etc. for assessment, disassembly, and possible repair.