Si el botón no responde, no puedo encender el portátil.

If the button doesn’t respond, I can’t turn on the laptop.

Breakdown of Si el botón no responde, no puedo encender el portátil.

• yo: I
• poder: can
• encender: to turn on
• .: period (punctuation mark)

Questions & Answers about Si el botón no responde, no puedo encender el portátil.

Why is it Si without an accent, not Sí?

Because si (no accent) is the conjunction meaning if. Sí (with an accent) means yes. In conditionals you always use si without the accent.

Should it be subjunctive (responda) after si?

No. For real or likely conditions, Spanish uses the indicative: Si el botón no responde... Use the subjunctive with patterns like como si or for unlikely/hypothetical conditions with the imperfect subjunctive: Si el botón no respondiera...

Can I use the future tense in this sentence?

You can use the future in the main clause: Si el botón no responde, no podré encender el portátil. Do not use future in the si clause; Spanish uses the present there (not si el botón no responderá).

Is no responde idiomatic for a button, or is no funciona better?

Both are idiomatic, but they nuance differently. No responde suggests you press it and nothing happens (lack of reaction). No funciona is a broader “it doesn’t work.” In Spain you’ll also hear colloquial options like no va, no reacciona, or no hace nada.