הפעמון לא עובד, וגם האינטרקום לא עובד, אבל התקע כבר במקום.

Yes—עובד literally means works for a masculine singular subject, and in Hebrew it is also used for machines and devices.

So:

• הפעמון לא עובד = The bell/doorbell doesn’t work
• האינטרקום לא עובד = The intercom doesn’t work

This is very natural Hebrew. Just like in English, the same verb can be used for both people and things:

• אני עובד = I work
• המחשב עובד = The computer works

Because both nouns here are treated as masculine singular:

• פעמון = masculine singular
• אינטרקום = masculine singular

So the verb form is עובד.

Compare:

• masculine singular: עובד
• feminine singular: עובדת
• masculine plural: עובדים
• feminine plural: עובדות

For example:

• הדלת לא עובדת = The door doesn’t work
  if you are speaking metaphorically about a mechanism and treating דלת as feminine

In Hebrew, לא is the standard word for negation in sentences like this, and it comes before the verb:

• לא עובד = doesn’t work
• לא בא = isn’t coming / doesn’t come
• לא יודע = don’t know / doesn’t know

So:

• הפעמון לא עובד
• literally: the bell not works
• natural English: the bell doesn’t work

It is repeated because that is the most natural and clear structure here:

• הפעמון לא עובד, וגם האינטרקום לא עובד

This mirrors English quite well:
The bell doesn’t work, and the intercom doesn’t work either.

You can sometimes avoid repeating the verb in Hebrew if the meaning is obvious, but repeating it is very normal and often sounds better.

For example, a shorter version like:

• הפעמון וגם האינטרקום לא עובדים

would mean The bell and the intercom don’t work, but that is a slightly different structure.

וגם means and also, and ... too, or as well.

It is made of:

• ו־ = and
• גם = also / too

So:

• וגם האינטרקום לא עובד = and the intercom also doesn’t work

It adds another item to the complaint or description.

Compare:

• גם אני בא = I’m coming too
• הוא עייף וגם רעב = He is tired and also hungry

ו just means and.

וגם means and also / and in addition.

So וגם gives a stronger sense of adding one more thing.

Compare:

• הפעמון לא עובד והאינטרקום לא עובד
  = The bell doesn’t work and the intercom doesn’t work

• הפעמון לא עובד, וגם האינטרקום לא עובד
  = The bell doesn’t work, and the intercom doesn’t work either

The second version sounds a little more like piling on bad news.

אבל means but. It introduces a contrast.

The sentence says, in effect:

• the bell doesn’t work
• the intercom doesn’t work
• but the plug is already in place

So the speaker is contrasting the failure of the devices with the fact that the plug is already where it should be.

This suggests something like:
The problem is not that the plug is missing.

כבר usually means already.

So:

• התקע כבר במקום = The plug is already in place

It often implies one of these ideas:

• this has already happened
• this should not still be an issue
• the expected condition is already true

Here it suggests:
The plug has already been put in place, so that is not the problem.

Because in the present tense, Hebrew usually does not use a separate word for am / is / are.

So:

• התקע במקום
  literally: the plug in-place naturally: the plug is in place

Adding כבר gives:

• התקע כבר במקום = the plug is already in place

This is a very important Hebrew pattern:

• הוא בבית = He is at home
• הספר על השולחן = The book is on the table
• היא עייפה = She is tired

No present-tense is appears in Hebrew.

Here, במקום means in place or in its place.

So:

• התקע כבר במקום = The plug is already in place

You are right that במקום can also mean instead of, depending on context.

Compare:

• התקע במקום = The plug is in place
• במקום קפה, אני רוצה תה = Instead of coffee, I want tea

So the same form can mean different things, but here the meaning is clearly in place, not instead of.

ה־ is the Hebrew definite article, meaning the.

So:

• הפעמון = the bell / the doorbell
• האינטרקום = the intercom
• התקע = the plug

Hebrew attaches the directly to the beginning of the noun, instead of writing it as a separate word.

Not always. פעמון literally means bell.

Depending on context, it can mean:

• a bell
• a doorbell
• a bell-like ringing device

In this sentence, because it appears together with האינטרקום and התקע, the natural interpretation is probably the doorbell.

So this is a good example of context deciding the most natural English translation.

אינטרקום is a borrowed word, basically intercom adapted to Hebrew pronunciation and spelling.

Hebrew uses many loanwords, especially for modern objects and technology.

So a learner should not be surprised to see familiar international words written in Hebrew letters.

No. התקע means the plug.

Related words:

• תקע = plug
• שקע = socket / outlet

So:

• התקע במקום = The plug is in place
• השקע בקיר = The socket is in the wall

This is a useful distinction because learners often mix up תקע and שקע.

Yes, very normal.

The structure is:

• הפעמון לא עובד
• וגם האינטרקום לא עובד
• אבל התקע כבר במקום

This is straightforward spoken and written Hebrew. It follows a very common pattern:

1. statement
2. added statement
3. contrast

So the sentence feels natural and conversational.