Monitörü açıp parlaklığı düşürdüm.

to turn on

Breakdown of Monitörü açıp parlaklığı düşürdüm.

• parlaklık: the brightness
• -ıp: and
• düşürmek: to lower

Questions & Answers about Monitörü açıp parlaklığı düşürdüm.

What does the suffix -ıp in açıp do here?

It’s a converb meaning roughly “and (then) …”, linking two actions with the same subject in a tight sequence. The tense/person comes only from the main verb (düşürdüm), and applies to both actions.

• Forms: -ıp/-ip/-up/-üp (vowel harmony). After aç- you get açıp.
• It implies “first open, then lower.”
• Negative is possible: açmayıp = “without opening / not opening (and then …).”

Why is it Monitörü (with -ü) instead of just Monitör?

Because it’s a definite direct object and must take the accusative. Turkish marks specific/known direct objects with -(y)ı/i/u/ü by vowel harmony.

• Monitör = “a/any monitor” (indefinite, no accusative)
• Monitörü = “the monitor” (definite accusative), which fits the context here.

If you wanted it indefinite, you’d say Bir monitör açtım (“I turned on a monitor”).

Why is it parlaklığı and not parlaklık?

For the same reason: it’s a specific object, so it takes the definite accusative. Also note the consonant softening:

• parlaklık
  • -ı (accusative) → parlaklığı (k → ğ before a vowel)

Could I say parlaklığını instead of parlaklığı?