Elektronik tablodaki her satırı dikkatle kontrol ediyorum.

tablodaki breaks down into three parts:
• tablo = “table” or “spreadsheet”
• -da = locative suffix, “in/at” → tabloda = “in the table”
• -ki = a relative/adjectival suffix meaning “that is …” or “which is …”
Putting them together, tablodaki literally means “that is in the table/spreadsheet.” In our sentence, it modifies her satırı, giving “every row that is in the electronic spreadsheet.”

• her means “each/every” and always pairs with a singular noun in Turkish.
• satır means “row.”
• Because satırı is a definite direct object (“every row” is specific), it takes the accusative suffix -ı (vowel‐harmonized to match “a” → “ı”).
So her satırı = “each/ every row” as the object of the verb.

• satır is used for a “row” in a text or a spreadsheet.
• sıra can mean “queue,” “turn,” “desk in a classroom,” or “order.”
Since we’re talking about rows in an electronic spreadsheet, satır is the correct word.

Yes, satırları is the plural accusative form (“the rows”), so
• Tablodaki satırları dikkatle kontrol ediyorum.
would mean “I carefully check the rows in the spreadsheet” (as a group).
Using her satırı emphasizes “each row individually.”

• dikkat = “attention.”
• -le = instrumental/manner suffix meaning “with.”
Combine them to get dikkatle = “with attention,” i.e. “carefully.” In Turkish, attaching -le to a noun often makes an adverb of manner.

Both are possible:
• kontrol etmek (“to check”)
• kontrol yapmak (“to do a check”)
kontrol etmek is more common when you mean “to check/review,” so “kontrol ediyorum” is the usual choice here.

The neutral order in Turkish is Subject–Object–Verb (SOV). In this sentence:
• Subject: (ben) “I” (omitted because it’s clear from the verb ending)
• Object: Elektronik tablodaki her satırı
• Adverb (manner): dikkatle
• Verb: kontrol ediyorum
You can shift elements for emphasis, but SOV with adverbs before the verb is the standard, unmarked pattern.