Endeks sayaçta görünmüyor.

A word-by-word breakdown is:

• endeks = index, reading, or in technical contexts often meter reading
• sayaçta = on the meter / in the meter / at the meter
• görünmüyor = is not visible, does not appear, is not showing

So the sentence literally feels like:

• The reading is not appearing on the meter
• or more naturally in English: The meter reading is not visible / not showing on the meter

Because Turkish uses the locative suffix here, meaning in/on/at.

The basic suffix is:

• -da / -de / -ta / -te

Which version you use depends on:

1. vowel harmony
2. whether the last consonant is voiced or voiceless

For sayaç:

• the last vowel is a, so you need a back-vowel version: -da or -ta
• the word ends in ç, which is a voiceless consonant
• after a voiceless consonant, d becomes t

So:

• sayaç + ta = sayaçta

It can cover both ideas.

The Turkish locative suffix -da/-de/-ta/-te is broader than any single English preposition. Depending on context, sayaçta can mean:

• in the meter
• on the meter
• at the meter

In this kind of technical sentence, English usually says:

• on the meter
• or on the display

So although Turkish just says sayaçta, English chooses the most natural preposition for the situation.

Görünmüyor comes from the verb görünmek, which means:

• to appear
• to be visible
• to be seen
• to show up

Here it is in the negative present continuous / current-state form:

• görün- = appear / be visible
• -müyor = is not ...-ing / is not happening / is not in that state

So:

• görünmüyor = is not visible, is not appearing, is not showing

In Turkish, this form is very common for things that are currently not showing up, even when English might prefer a more stative translation like isn’t visible.

This is a very useful distinction:

• görmek = to see
• görünmek = to be seen / to appear / to look

Examples:

• Ben sayıyı görüyorum. = I see the number.
• Sayı görünmüyor. = The number is not visible / not showing.

So in your sentence, Turkish does not mean someone does not see the index.
It means the index itself is not visible.

Because Turkish does not have definite articles like English the.

So endeks can mean:

• the index
• an index
• the reading
• a reading

The exact meaning comes from context.

In a real-life technical situation, Endeks sayaçta görünmüyor would usually be understood as:

• The reading is not visible on the meter

even though Turkish does not use a separate word for the.

Because endeks is the subject of the sentence, not a direct object.

Turkish often marks a definite direct object with -(y)i, but subjects do not take that marking.

Here the structure is roughly:

• Endeks = subject
• sayaçta = location
• görünmüyor = verb

So:

• Endeks sayaçta görünmüyor. = The reading is not visible on the meter.

If endeksi appeared, it would suggest that endeks is an object, which would not fit this sentence.

No, Turkish word order is flexible, but the verb usually comes at the end.

Your sentence:

• Endeks sayaçta görünmüyor.

is a normal, natural order.

You could also hear:

• Sayaçta endeks görünmüyor.

This shifts the emphasis a bit more toward on the meter.

Very roughly:

• Endeks sayaçta görünmüyor. = neutral: The reading isn’t visible on the meter.
• Sayaçta endeks görünmüyor. = On the meter, the reading isn’t visible.

So the meaning stays basically the same, but the focus changes.

Yes, formally it uses the -yor form, which is often called the present continuous.

But in Turkish, -yor is used very broadly. It can describe:

• actions happening now
• temporary situations
• current states

So görünmüyor literally looks like is not appearing, but in natural English it often becomes:

• is not visible
• is not showing
• does not appear

That is why the translation may sound less continuous in English than the Turkish grammar suggests.

In technical or utility contexts, endeks often means the meter reading.

So although the dictionary meaning is index, in sentences about meters, billing, or utilities it often refers to the number/value shown by the meter.

That is why this sentence is likely about a device display, and a natural English translation would be something like:

• The meter reading is not visible.
• The reading is not showing on the meter.

A simple pronunciation guide:

• Endeks → EN-deks
• sayaçta → sa-YAÇ-ta
• görünmüyor → gö-rün-MÜ-yor

A few sound notes:

• ç sounds like ch in church
• ö is like the vowel in German schön or French peu
• ü is like the vowel in French tu or German über
• ğ does not appear in this sentence

Stress is usually not very strong in Turkish compared with English, but saying it smoothly like this will sound natural:

• EN-deks sa-YAÇ-ta gö-rün-MÜ-yor