Setibanya di kantor, saya menyalakan monitor dan memeriksa mouse komputer.

Setibanya comes from tiba, which means to arrive. In this pattern, se- ... -nya gives the sense of upon arriving or when ... arrived.

So setibanya di kantor means upon arriving at the office. It is a compact, slightly formal way to introduce a time clause.

Yes, it sounds somewhat formal or written. It is perfectly correct, but in casual speech Indonesian speakers often use alternatives such as:

• sesampainya di kantor
• waktu saya sampai di kantor
• pas sampai di kantor

All of these can express a similar idea, but setibanya di kantor has a more polished, written feel.

Here, di is a preposition meaning at, in, or sometimes to, so it is written separately from the following noun: di kantor = at the office.

This is different from the prefix di- used in passive verbs, which is written attached to the verb. For example:

• di kantor = at the office
• diperiksa = was checked

This is a very common point of confusion for learners.

The subject is understood from the main clause: saya. So the sentence naturally means that I arrived at the office, then I turned on the monitor and checked the computer mouse.

Indonesian often allows this kind of structure, where the subject of the opening time phrase is not stated separately because it is clear from the rest of the sentence.

Menyala means to be on / to light up / to glow. It describes a state.

Menyalakan means to turn on / switch on / cause something to be on. The suffix -kan often gives a causative meaning, so menyalakan monitor means to turn the monitor on.

Compare:

• Monitor itu menyala = The monitor is on.
• Saya menyalakan monitor = I turned on the monitor.

This happens because of the meN- verb-forming prefix. When this prefix attaches to a root beginning with p, the p usually drops.

So:

• periksa → memeriksa

This is a very common sound change in Indonesian verb formation. Similar examples are:

• pakai → memakai
• pilih → memilih

So memeriksa simply means to examine / to inspect / to check.

Indonesian normally puts the main noun first and the modifier after it. So:

• mouse komputer = computer mouse
• monitor komputer = computer monitor
• meja kantor = office desk

This is the opposite of normal English order in many noun phrases.

Also, in everyday Indonesian, many speakers would just say mouse if the context is already clear. Adding komputer makes it more specific.

Yes, mouse is very commonly used in Indonesian, especially in technology contexts. It is a borrowing from English.

There is also a more Indonesian-style term, tetikus, but it is much less common in everyday speech. Most people will understand and use mouse.

The same is true for monitor, which is also a common borrowed word.

Sometimes yes, if the subject is already clear from context. Indonesian often drops pronouns more easily than English.

For example, in conversation, someone might say:

Setibanya di kantor, menyalakan monitor dan memeriksa mouse komputer.

However, in a full, careful sentence, keeping saya is clearer and more natural, especially in writing or for learners.

Because Setibanya di kantor is an introductory time phrase. The comma helps separate that opening phrase from the main clause:

Setibanya di kantor, saya menyalakan monitor dan memeriksa mouse komputer.

It works much like English commas after introductory phrases such as After arriving at the office, ... In very informal writing, people may leave the comma out, but using it here is good style.